Quote Originally Posted by LunarEmerald View Post
Mechanics

For phase 2, stay in the middle as much as possible. All platforms but the middle one can break.

Hellfire: stand in the water puddles.
Judgement Spark: don't stand in the water puddles.
Diamond Dust: stand in the middle and don't move till the ice disappears.
Earthen Fury: big aoe damage. Avoid standing on any platform but the middle during it.
Tidal Wave: go to the the very edge and stand by the water sprout or you will be pushed off.
Purple markers: spread out from other players.
Burning Chain: stand close together when marked then move apart when the chain actually appears.
Aerial Blast: continuously move towards the center to avoid getting blown off.
Earth Breath: marked players should bait the attack away from the group.
Tail: quickly kill it to take a big chunk of the boss's HP
Ahk Morn: targeted on the tank. Don't stand near them..
Charge attack across the arena: sprint to the nearest side. If you don't sprint, you may not make it.
During Akh Morn, he also uses another version(Akh Reim or something) on a non-tank party member. I'm pretty sure you want to avoid the puddles for the purple markers, since they reduce your lightning resistance, but I haven't tried it.

It's a test of all the ARR primals and Bahamut Prime, which is something I really like.