Since it can only take this damage once per turn, what you should do is concentrate on Flame Arrows and distribute them to your archer allies and bow wielding skeletons from Animate Dead [necromancy wizards get to add proficiency bonus to their minion's damage rolls]. Commanding them to attack requires no action and you could even cast flame arrows in advance since the duration is 1 hour. You should also probably take Elemental Adept Fire if you want to get more longevity out of this strategy. It's a shame that elemental bane is a 4th level spell, has concentration and is a con save, the combination of these make the spell basically unusable. Otherwise that would have been a useful addition. Edit: another potential avenue of damage for this strategy is Hexblade's Curse. Since you add your proficiency mod to your damage rolls against the cursed creature, this could be argued to apply to every 1d6 from Flame Arrows, since it's a damage roll that originates from your spellcasting. Also, the Flames of P.. feat would let you reroll every 1 rolled for flame arrows as well to eke out a little more damage [a d6's average roll of 3.5 becomes 3.91, or 3.94 if you also have elemental adept], but it's more useful for aoe spells like fireball
a cool trick i think would be scribes, instead of blade singer. you can then do fire type magic missile, doing 1d4+6 damage missile at level 5, scaling really well
I really like this idea but I have an idea.. having rewatched d4 recently on blade singer flame build I had a thought on a build.. Blade singer/thief like this but haste and blade song turn 1 then subsequent rounds bonus action oil, attack action green flame blade and dragon’s breath from new dragon born and use the haste’s extra attack to alchemist fire (and if on a bbg or something that survives the onslaught, bonus action alchemist fire) I’ve even considered ashadlon’s stride instead of haste to weapon is movement, especially if you can get hasted from another source
I've always liked combining it with the thief rogue, crusher and create bonfire. Create bonfire does 3 points of instances for damage, when you cast it, when they move into it and when they end their turn in it. So you can create bonfire, and then throw the flask as an improvised weapon to knock them 5ft up with crusher. So they fall back down into the bonfire.
If you take genie warlock with the efreet option it combos really well. Genie’s wrath automatically does your proficiency modifier in fire damage when you hit with the oil causing it to ignite and do 5 extra damage. So your oil does 1d4+dex+prof+5 as a bonus action.
Cool idea with the oil, thanks! Just one thing: it's limited to only 5 damage per turn. So it wouldn't work with Scorching Ray to deal the additional damage multiple times.
Actually no where in the wording does it say that it's only once per turn just that it does an additional 5 fire damage when a target takes fire damage
@@horbi3683 I think that statement is only meant to apply to the "Also" section. When you pour the contents of the flask on the ground and set it on fire, a creature can only take that fire damage once per turn. This tracks with how 5E usually does AOE stuff
@@g1ngerbred723 You might be right. However, given the resulting gap in potential damage between the first and the second application, I'd assume that the limitation also applies to the first application.
First time commenting on any of these videos. I love this build so much. I would be a lizard folk who is cooking his meals before he eats them. That would be so much fun to role-play
i've got a cool idea for a new serie after the one with the bad multiclass options, try making a multiclass character with all classes that need a specific stat. so for strenght you would need barbarian, paladin and fighter for dexterity you'd need fighter, monk, ranger and rogue for constitution you would need every class (which you already did so you could ignore this one) or go with all melee classes (barb, fighter, monk, paladin, ranger and rogue) for intelligence you would need to take levels in artificer and wizard for wisdom would require cleric, druid, monk and ranger and finally charisma would be a character with levels in bard, paladin, sorcerer and warlock to make it more fun you could require the build to have a subclass in all classes and limit you to only those classes and none of the other classes.
I literally was up last night trying to figure out how to make the oil flask viable. My route was going thrown weapon fighting style fighter with either fire druid or artillerist artificer for an easy way to create oil flasks and alchemist fire. Theif rouge is really good for that ba fast hands
I think you missed out by not going order of scribes. Fire damage booming blade. Fire damage brew. Fire damage magic missiles when multiple people are covered.
Ooh man this build has such an incredible concept and unique playstyle, i love it! You are the best as always! 🤩 (I'm an old subscriber but i changed my YT profile to have more privacy, so it may seem like i'm new)
I could swear I got this build idea from you, but I can't find any video on it. I have an NPC arsonist set to appear in my campaign soon-ish. He's a Goblin Efreet Warlock/Thief Rogue. Uses fast hands to throw a flask of oil at an enemy's square and his action to throw one at the enemy. Genie's Wrath lets him do a bit of fire damage on a hit with an attack roll, which then ignites the oil on the target, which ignites the oil on the ground. You can also add in Fury of the Small and possibly sneak attack on that initial hit for big fire damage out of the gate.
It may sound like a crazy combo but what about theif. Dragon Sorcerer with tranmute spell and twin spell. Also maybe a 1 dip into hexblade for the hex charisma attacks and edltrich blast Armor of Agathys and Hex to change to fire.
Can you make a Swashbuckling Rogue/Drakewarden Ranger build thematically, I see it has a pirate who finds a dragon egg and becomes an awesome flying shock attack with guaranteed advantage with flanking.
I want to point out some other option: Clockwork Sorcerer - Transmute Armor of agathulys - Transmute caustic brew - Fire shield You get the scorching ray and meteors with this combo as well.
Additionally, if you have high dex try to get a longbow of conflagration. It is a firebox that ignights them in fire. If you are in a level 20 one-shot or something then you want a red dragon mask. If you are a sorcerer, you want the fire essence shard to deal fire damage with your meta magic
Another option I think is RAW, would be scribes wizard instead of blade singer. bonus action throw oil flask and action cast magic missile and change the damage type to fire.
if we go for fighter and at least 7 lvls of scribes wizard, taking 1 more lvl for echo knight seems cool to me. This way when things get bad for you you'll use Otiluke's resilient sphere and the manifest echo and book outside of the sphere and they can't attack you, but you can attack them. 😂🤪
If you want to *ACTUALLY* double the damage from Scorching Ray (and more than double Fire Bolt), just play a bugbear and take War wizard instead of Bladesinger. 😈 This would mean you get 4d6 damage *per attack* on your first turn more often than not, since your INT mod would add to your initiative roll. Otherwise this is a cute gimmick, but the gimmick doesn't really scale well. I'll also note that if you're attacking with spells, you're foregoing your Sneak Attack damage. This isn't all that big a deal if you only go to rogue 3, but it becomes increasingly problematic if you continue on with rogue levels.
@@matthewlenard8346 To be entirely fair, you 100% could launch the flask with the catapult spell, however the effects would be entirely up to DM discretion. RAW, the flask requires you to use your action to activate the effect attached to the object. The catapult spell converts the effect to be 3d8 damage instead. Now rule of cool (if I was DMing) I would totally allow it, but I wanted to make sure you're aware of the RAW limitations :)
@@FireSparq I understand. Please hear me out because I am absolutely wackadoo. This builder Is utilizing the blade singer. At level six, the blaze singer gets extra attack and can use their cantrips as an option for the second attack action. We need wick/fuse, cloth of some type, gunpowder, clay and Druidcraft cantrip. The wick is lit and extinguished before it is attached to the flask out of combat. In combat the flask is launched up to ninety feet in a straight line using catapult. I can see the DM having you roll a D20 check in order to determine if you timing of Druidcraft is successful or not. On a success the wick is reignited lighting the oil on fire after they have taken the bludgeoning damage on the same turn. None of this is practical, but I often do things like this at my table. I can see my DM and I getting into at least three 20 minute conversations on science to determine whether or not such things could be performed in real life. Stupid question, does the spell sniper feat double the distance of catapult? 🤔
High level thief is potentially the hardest hitting martial in the game, as they could sneak attack four times in the first round, at 9 or 10d6 added to each attack.
@@kelceydane5874 I'm afraid not. The oil flask specifically calls out "using an action" which is the "use an object" action. The specific wording to Use an Object is: "You normally interact with an object while doing something else, such as when you draw a sword as part of an attack. When an object requires your action for its use, you take the Use an Object action. This action is also useful when you want to interact with more than one object on your turn." So thieves being able to use their bonus action for this action is actually pretty handy! I think D&D Daily has done a good job at weaponising that :D
@@FireSparq ? Correct, but I think I'm missing what that had to do with what I said. My reference was to sneak attack, which the lowly thief suddenly becomes the best at once they are level 17 (during round one.....and if it works, there might only be one round). They can attack, reaction attack after their turn if triggered, then attack again 10 initiative points later, and reaction attack once again if triggered. Takes some set up and planning, but it is possible they could go off for 4 x 11d6 with their short sword and sneak attack. Cheers.
@@FireSparq hey, no worries, I was confused, thought I missed something. That makes sense, you explained the point well, actually helped me understand the process, so thanks. Have a good one!
My question is, I am using the Heat Metal spell on a stupid meat head in heavy armor, about how many rounds would you say before the oil ignites? I am asking for a friend.
I think removing one substances after another is weird. I understand is raw, but they mixed together. So i assume most dms will rule to remove all substances at once. I cannot imagine how is it possible to remove acid, then oil, then alch fire 😅. Cool concept overall however
Excuse me I hope I'm not interrupting something but I haven't an idea and it's called the abomination hybrid and his he should be like in those things saruman made from Lord of the ring but this thing should part troll part giant part ogre but it's up to you
There is however an ''obligation'' to take the tavern brawler feat. Since the flask of oil says that it is to be used as an improvised weapon and you are not proficient with improvised weapons unless you have the tavern brawler feat. If you're not proficient with a weapon you have to make the attack with disadvantage, if you attack with disadvantage as a rogue you don't get to sneak attack. (also you might miss) Anyway when they get hit by the oil we can scorching ray them for +5 damage per ray on a bugbear or if we are playing as an order of scribes wizard with fire based magic missile. (this of course only works if the first use isn't interpreted as a 1 time thing, but re-occurs with each instance of fire damage)
it's an attack roll and familiars can't attack. A chain pact warlock with investment of the chain master invocation might be able to command it as a bonus action. Technically, the oil attack isn't from the attack action, so ymmv with that one
I gotchu. Dwarves are a cool race for poison resistances. But if the DM allows Yaun ti have magic resistance but my personal favorite is the reborn lineage. For poison damage, man this hurts me to say. Sorcerer is the only class that has more than idk 3 poison damage spells. And all the other classes have two poison damage cantrips (WEAK) So a sorcerer is the best option. And transmute spell can always swap out the damage type of your class. I hope that's enough of a baseline to build from. Edit: totally misread your message at 6am. My bad 😂
this is quite the challenge. One idea doesn't use gaseous form for damage, but they still can deal damage after casting it on themselves. Scourge aasimar [once per long rest immolation transformation] + spores druid (5+) [subclass w/ gaseous form access, halo of spores reaction] + death cleric (x) [spiritual weapon, channel divinity touch of death] -They can still make their spiritual weapon attack while under the effects of gaseous form, and they can apply their channel divinity damage [5 + 2 x cleric level necrotic damage] as well as transformation damage [extra damage = to either their character level or their proficiency bonus, depending on the version you use] to their spiritual weapon attacks. And then they can still make the spores reaction effect for a little more damage. A similar work around can be achieved with the four elements monk from level 11 on, though it doesn't benefit from aasimar. They can cast gaseous form on themselves and then use either water whip or fist of unbroken air. These effects deal 3d10 dmg [halved on a save] and can deal more with additional ki [up to 5d10 at level 11 and up to 7d10 at level 17] Throw on fighter 2 and you an do this action twice in a turn. Stars druid 2 would also allow you to still be able to make a bonus action ranged spell attack each turn. These disciplines could also knock a flying enemy prone in the sky causing fall damage, or water whip could pull them 25 feet across something like an allies spike growth [up to 10d4 damage]. This fall/forced movement could also bring them into an allies aoe, like wall of thorns, spirit guardians, prismatic sphere, etc. Though neither of these builds really seems op to me.
@@JugglingAddict oooh good one! they could also do some of their other invocation effects like maddening hex or rebuke of the talisman. Fiend patron with an active spiritual weapon or some other source of a spell attack could use their hurl through hell feature for 10d10 psychic damage once per long rest. Uses of a precast Produce Flame (1) or Crown of Stars (7) could also be at your disposal
Since it can only take this damage once per turn, what you should do is concentrate on Flame Arrows and distribute them to your archer allies and bow wielding skeletons from Animate Dead [necromancy wizards get to add proficiency bonus to their minion's damage rolls]. Commanding them to attack requires no action and you could even cast flame arrows in advance since the duration is 1 hour. You should also probably take Elemental Adept Fire if you want to get more longevity out of this strategy. It's a shame that elemental bane is a 4th level spell, has concentration and is a con save, the combination of these make the spell basically unusable. Otherwise that would have been a useful addition.
Edit: another potential avenue of damage for this strategy is Hexblade's Curse. Since you add your proficiency mod to your damage rolls against the cursed creature, this could be argued to apply to every 1d6 from Flame Arrows, since it's a damage roll that originates from your spellcasting. Also, the Flames of P.. feat would let you reroll every 1 rolled for flame arrows as well to eke out a little more damage [a d6's average roll of 3.5 becomes 3.91, or 3.94 if you also have elemental adept], but it's more useful for aoe spells like fireball
I've always been fond of a high velocity application method for both the Alchemist Fire and Lamp Oil: Level 1 Catapult.
Don't forget the dragon's breath familiar option as another source of fire damage :)
a cool trick i think would be scribes, instead of blade singer.
you can then do fire type magic missile, doing 1d4+6 damage missile at level 5, scaling really well
I really like this idea but I have an idea.. having rewatched d4 recently on blade singer flame build I had a thought on a build..
Blade singer/thief like this but haste and blade song turn 1 then subsequent rounds bonus action oil, attack action green flame blade and dragon’s breath from new dragon born and use the haste’s extra attack to alchemist fire (and if on a bbg or something that survives the onslaught, bonus action alchemist fire)
I’ve even considered ashadlon’s stride instead of haste to weapon is movement, especially if you can get hasted from another source
I've always liked combining it with the thief rogue, crusher and create bonfire.
Create bonfire does 3 points of instances for damage, when you cast it, when they move into it and when they end their turn in it. So you can create bonfire, and then throw the flask as an improvised weapon to knock them 5ft up with crusher. So they fall back down into the bonfire.
If you take genie warlock with the efreet option it combos really well. Genie’s wrath automatically does your proficiency modifier in fire damage when you hit with the oil causing it to ignite and do 5 extra damage. So your oil does 1d4+dex+prof+5 as a bonus action.
Cool idea with the oil, thanks! Just one thing: it's limited to only 5 damage per turn. So it wouldn't work with Scorching Ray to deal the additional damage multiple times.
Actually no where in the wording does it say that it's only once per turn just that it does an additional 5 fire damage when a target takes fire damage
@@gadgetronking4255 It's the last sentence of the item description (DnD Beyond). A creature can take this damage only once per turn.
@@horbi3683 I think that statement is only meant to apply to the "Also" section. When you pour the contents of the flask on the ground and set it on fire, a creature can only take that fire damage once per turn. This tracks with how 5E usually does AOE stuff
@@g1ngerbred723 You might be right. However, given the resulting gap in potential damage between the first and the second application, I'd assume that the limitation also applies to the first application.
@@g1ngerbred723 the same design principal also applies to rider damage [adding a modifier/extra die to 1 damage roll of a designated damage type]
First time commenting on any of these videos. I love this build so much. I would be a lizard folk who is cooking his meals before he eats them. That would be so much fun to role-play
i've got a cool idea for a new serie after the one with the bad multiclass options, try making a multiclass character with all classes that need a specific stat.
so for strenght you would need barbarian, paladin and fighter
for dexterity you'd need fighter, monk, ranger and rogue
for constitution you would need every class (which you already did so you could ignore this one) or go with all melee classes (barb, fighter, monk, paladin, ranger and rogue)
for intelligence you would need to take levels in artificer and wizard
for wisdom would require cleric, druid, monk and ranger
and finally charisma would be a character with levels in bard, paladin, sorcerer and warlock
to make it more fun you could require the build to have a subclass in all classes and limit you to only those classes and none of the other classes.
This is the continuation of the Thief Commando
I literally was up last night trying to figure out how to make the oil flask viable. My route was going thrown weapon fighting style fighter with either fire druid or artillerist artificer for an easy way to create oil flasks and alchemist fire. Theif rouge is really good for that ba fast hands
This build is great. I've always had fun turning my oil flasks into Molotov Cocktails.
I think you missed out by not going order of scribes. Fire damage booming blade. Fire damage brew. Fire damage magic missiles when multiple people are covered.
Ooh man this build has such an incredible concept and unique playstyle, i love it!
You are the best as always! 🤩
(I'm an old subscriber but i changed my YT profile to have more privacy, so it may seem like i'm new)
Are those earrings?
God damn i love them.
😎😳
I could swear I got this build idea from you, but I can't find any video on it. I have an NPC arsonist set to appear in my campaign soon-ish.
He's a Goblin Efreet Warlock/Thief Rogue. Uses fast hands to throw a flask of oil at an enemy's square and his action to throw one at the enemy. Genie's Wrath lets him do a bit of fire damage on a hit with an attack roll, which then ignites the oil on the target, which ignites the oil on the ground. You can also add in Fury of the Small and possibly sneak attack on that initial hit for big fire damage out of the gate.
It may sound like a crazy combo but what about theif. Dragon Sorcerer with tranmute spell and twin spell. Also maybe a 1 dip into hexblade for the hex charisma attacks and edltrich blast Armor of Agathys and Hex to change to fire.
Unfortunately, Transmute Spell only works with elemental damage types, and Hex is force damage.
Transmuting Armor of Agathys is a cool idea though.
Can you make a Swashbuckling Rogue/Drakewarden Ranger build thematically, I see it has a pirate who finds a dragon egg and becomes an awesome flying shock attack with guaranteed advantage with flanking.
I want to point out some other option:
Clockwork Sorcerer
- Transmute Armor of agathulys
- Transmute caustic brew
- Fire shield
You get the scorching ray and meteors with this combo as well.
Additionally, if you have high dex try to get a longbow of conflagration. It is a firebox that ignights them in fire.
If you are in a level 20 one-shot or something then you want a red dragon mask.
If you are a sorcerer, you want the fire essence shard to deal fire damage with your meta magic
Now I want to be a Pyro and light all my enemies on fire. Great build.
Another option I think is RAW, would be scribes wizard instead of blade singer. bonus action throw oil flask and action cast magic missile and change the damage type to fire.
if we go for fighter and at least 7 lvls of scribes wizard, taking 1 more lvl for echo knight seems cool to me. This way when things get bad for you you'll use Otiluke's resilient sphere and the manifest echo and book outside of the sphere and they can't attack you, but you can attack them. 😂🤪
If you want to *ACTUALLY* double the damage from Scorching Ray (and more than double Fire Bolt), just play a bugbear and take War wizard instead of Bladesinger. 😈 This would mean you get 4d6 damage *per attack* on your first turn more often than not, since your INT mod would add to your initiative roll.
Otherwise this is a cute gimmick, but the gimmick doesn't really scale well. I'll also note that if you're attacking with spells, you're foregoing your Sneak Attack damage. This isn't all that big a deal if you only go to rogue 3, but it becomes increasingly problematic if you continue on with rogue levels.
“It’s arson!”
“What?”
“Aye, some kids are arse’n around!”
Magic initiate feat choose wizard for fire bolt and the 1st level spell from book of lost spells: flaming bolts
Definitely chucking oil flasks with the catapult spell.
Unfortunately, RAW that won't work
@@FireSparq please forgive me, I truly am curious, Why am I unable to chuck a oil flask with the catapult spell.
@@matthewlenard8346 To be entirely fair, you 100% could launch the flask with the catapult spell, however the effects would be entirely up to DM discretion. RAW, the flask requires you to use your action to activate the effect attached to the object. The catapult spell converts the effect to be 3d8 damage instead. Now rule of cool (if I was DMing) I would totally allow it, but I wanted to make sure you're aware of the RAW limitations :)
@@FireSparq I understand. Please hear me out because I am absolutely wackadoo. This builder Is utilizing the blade singer. At level six, the blaze singer gets extra attack and can use their cantrips as an option for the second attack action. We need wick/fuse, cloth of some type, gunpowder, clay and Druidcraft cantrip. The wick is lit and extinguished before it is attached to the flask out of combat. In combat the flask is launched up to ninety feet in a straight line using catapult. I can see the DM having you roll a D20 check in order to determine if you timing of Druidcraft is successful or not. On a success the wick is reignited lighting the oil on fire after they have taken the bludgeoning damage on the same turn.
None of this is practical, but I often do things like this at my table. I can see my DM and I getting into at least three 20 minute conversations on science to determine whether or not such things could be performed in real life.
Stupid question, does the spell sniper feat double the distance of catapult? 🤔
Fun build! Aren't the flask attacks actual attacks VS use an object action? Even if so, I'd allow it since the thief is pretty under-tuned.
High level thief is potentially the hardest hitting martial in the game, as they could sneak attack four times in the first round, at 9 or 10d6 added to each attack.
@@kelceydane5874 I'm afraid not. The oil flask specifically calls out "using an action" which is the "use an object" action. The specific wording to Use an Object is: "You normally interact with an object while doing something else, such as when you draw a sword as part of an attack. When an object requires your action for its use, you take the Use an Object action. This action is also useful when you want to interact with more than one object on your turn."
So thieves being able to use their bonus action for this action is actually pretty handy! I think D&D Daily has done a good job at weaponising that :D
@@FireSparq ? Correct, but I think I'm missing what that had to do with what I said. My reference was to sneak attack, which the lowly thief suddenly becomes the best at once they are level 17 (during round one.....and if it works, there might only be one round). They can attack, reaction attack after their turn if triggered, then attack again 10 initiative points later, and reaction attack once again if triggered. Takes some set up and planning, but it is possible they could go off for 4 x 11d6 with their short sword and sneak attack. Cheers.
Ah crap. Sorry Kelcey I've replied to the wrong person. That was meant to be directed at AlliedVoyd
@@FireSparq hey, no worries, I was confused, thought I missed something. That makes sense, you explained the point well, actually helped me understand the process, so thanks. Have a good one!
My question is, I am using the Heat Metal spell on a stupid meat head in heavy armor, about how many rounds would you say before the oil ignites? I am asking for a friend.
Since it deals fire damage, it will proc the 5 extra damage at the exact same time. Hope that helps
I think removing one substances after another is weird. I understand is raw, but they mixed together. So i assume most dms will rule to remove all substances at once. I cannot imagine how is it possible to remove acid, then oil, then alch fire 😅. Cool concept overall however
Excuse me I hope I'm not interrupting something but I haven't an idea and it's called the abomination hybrid and his he should be like in those things saruman made from Lord of the ring but this thing should part troll part giant part ogre but it's up to you
Eh, it's pretty fire 🔥
It’s Lit 🔥
Character name Johnny Storm “flame on”
Your role play hook could be horrible flame related dad jokes….
“Dad, are we pyromaniacs?” Dad responds “ we Arson”
Cool idea, but using flask is normal action, not bonus action, right..?
with the thief subclass, you can use objects as a bonus action i think
@@remimercier6882@henshinization He is correct this allows for using the oil flask as a bonus action.
Can you not interact with an object. As an arsonist .you would have your flasks handy
@@lancejensen1063 @remimercier6882 Ihoped that's the case, thanks bros! :)
There is however an ''obligation'' to take the tavern brawler feat. Since the flask of oil says that it is to be used as an improvised weapon and you are not proficient with improvised weapons unless you have the tavern brawler feat. If you're not proficient with a weapon you have to make the attack with disadvantage, if you attack with disadvantage as a rogue you don't get to sneak attack. (also you might miss)
Anyway when they get hit by the oil we can scorching ray them for +5 damage per ray on a bugbear or if we are playing as an order of scribes wizard with fire based magic missile.
(this of course only works if the first use isn't interpreted as a 1 time thing, but re-occurs with each instance of fire damage)
What was the rogue subclass?
Thief
Couldn’t you just have a familiar pour the oil?
it's an attack roll and familiars can't attack. A chain pact warlock with investment of the chain master invocation might be able to command it as a bonus action. Technically, the oil attack isn't from the attack action, so ymmv with that one
Im parity sher the answer isn't arson.
Challenge make gaseous form a op damage dealer
I gotchu. Dwarves are a cool race for poison resistances. But if the DM allows Yaun ti have magic resistance but my personal favorite is the reborn lineage.
For poison damage, man this hurts me to say. Sorcerer is the only class that has more than idk 3 poison damage spells. And all the other classes have two poison damage cantrips (WEAK)
So a sorcerer is the best option. And transmute spell can always swap out the damage type of your class.
I hope that's enough of a baseline to build from.
Edit: totally misread your message at 6am. My bad 😂
this is quite the challenge.
One idea doesn't use gaseous form for damage, but they still can deal damage after casting it on themselves. Scourge aasimar [once per long rest immolation transformation] + spores druid (5+) [subclass w/ gaseous form access, halo of spores reaction] + death cleric (x) [spiritual weapon, channel divinity touch of death] -They can still make their spiritual weapon attack while under the effects of gaseous form, and they can apply their channel divinity damage [5 + 2 x cleric level necrotic damage] as well as transformation damage [extra damage = to either their character level or their proficiency bonus, depending on the version you use] to their spiritual weapon attacks. And then they can still make the spores reaction effect for a little more damage.
A similar work around can be achieved with the four elements monk from level 11 on, though it doesn't benefit from aasimar. They can cast gaseous form on themselves and then use either water whip or fist of unbroken air. These effects deal 3d10 dmg [halved on a save] and can deal more with additional ki [up to 5d10 at level 11 and up to 7d10 at level 17] Throw on fighter 2 and you an do this action twice in a turn. Stars druid 2 would also allow you to still be able to make a bonus action ranged spell attack each turn. These disciplines could also knock a flying enemy prone in the sky causing fall damage, or water whip could pull them 25 feet across something like an allies spike growth [up to 10d4 damage]. This fall/forced movement could also bring them into an allies aoe, like wall of thorns, spirit guardians, prismatic sphere, etc.
Though neither of these builds really seems op to me.
@@elliotbryant3459It's not much, but warlock can also 5 poison damage with cloak of flies.
@@JugglingAddict oooh good one! they could also do some of their other invocation effects like maddening hex or rebuke of the talisman. Fiend patron with an active spiritual weapon or some other source of a spell attack could use their hurl through hell feature for 10d10 psychic damage once per long rest. Uses of a precast Produce Flame (1) or Crown of Stars (7) could also be at your disposal
I would rule as a DM that the 5 damage from the burning oil would be only once per turn.