「Granblue Fantasy」Colossus Ira Omega

Again, this setup is completely okay in full-auto, just share the room. Magna grid is fine as usual.
Normally I'd just skip the CA animations. It would save me like 5 minutes or something like that.
Colossus Ira is arguably the hardest Magna 3 boss yet. He is the best and worst designed of the bunch at the same time. As a boss he's really fun to fight. Because of his mechanic you can't just come in and spam tons of damage easily since he has a buff that reduces you damage by quite a lot. Unless you're a whale of course.
You can reduce his passive by doing 2M damage 4 times in 1 turn. Which kinda force you to go CA party setup. Perfectly fine for Magna grid since you have Europa's harp that boost CA.
For that reason (his mechanic), make him quite a fun boss to fight. But at the same time most TEDIOUS to grind.
Once his passive is gone he will go down pretty fast due to insane amount of damage water can do. Although he still has one attack, Dimensional Cleave : Extirpation. Deals a ton of damage, really reminds us of how Colossus fight went in the past.
When he's below 40% he will use Raging Heat which gives him "Flame of Wrath" buff which will boost his Dimensional Cleave's damage by a lot.
It's a GOOD idea to let him use this move then negate Dimensional Cleave's damage by damage mitigation, which Water is really good at.
After he uses the powered up Dimensional Cleave then he will be burned out and won't be able to do the attack again. Making him much easier for the rest of the fight.