Mechanic based fights are pretty much par for the course now. However, the problem FF has is that it doesn't tier these fights. I would suggest that they just need to add story mode, hard mode and savage mode.

Story mode - some mechanics, 1 easy instant death (curtain call type). Mechanics do reduced damage. Drops BIS i95.

Hard mode - all mechanics, one easy instant death one harder. Other mechanics do normal damage. Drops BIS i100

Savage mode - all mechanics, all instant death intended in the fight. No damage scaling. Drops BIS i110

The suggested gear drops are for second coil as it currently stands.