BS2 SL1 DLC3 Boss 8 (First Appearance)

Done without leveling up, taking any stat-up souls, or going into Chaos Dungeon.
Covenant is Bandersnatch. Done using two Celestial Rings, a Black Rabbit Ring and a ring that increases all stats by 500
Important: Wear Rez armor for a .8^20=1.152921504% chance to get a turn(Should have a turn once every hour considering the 30-35s average time of a cycle).
So the main crux of the plan is to get him as close to 50% as possible then hit him with a single action that will bring his health down to 0 from there. This need to be done in one action(not turn) because otherwise he will heal to full as soon as his health reaches 49% or below. Thankfully, I found out that Unicorn Sword can deal a large amount of damage in a single action. Also, all of this has to be done in a two turns. Otherwise he barrages with the 20 hit combo yet again.
Turn 1: I have 4 actions this turn. Use mabel's liquor to get 4 actions next turn and Fairy's Wing to ensure speed. Because there's not enough max MP, also use two pens and heal MP to full. Switch to Sword of Giants and use HAMMER bringing his health down to 75%. Switch to Twin Swords and use normal attack to get attack buff. Switch to Wand of R'lyeh and use SPIRITUAL UNITY. Switch to Master Thief's Dagger to boost speed and use PHALANX for more attack increase. I will lap him in turn so he doesn't get any yet.
Turn 2: Heal all MP. Buff Using all elemental attributes. Buff with screws and Golden Mead. Switch to Sword of Giants and cast HAMMER which will bring him down to under 56.5% HP, Switch to Unicorn Sword and cast the last skill, then the first skill. Switch to Anchor. If done right, Attack should be just a bit under the max cap. Cast any 0 MP skill or action. This is kinda overkill, but should kill him.

[@aidar_dindo3503]

Freakin' dude never know how to STOP SMASHING MEE!!
he really spamming knife,burn to hell, get drugged, every move he does really deadly