The video below states it shows heroic tactics, but as far as I can tell, these also cover Normal as well.
Mark segments on outside for ranged bait locations, and for meteor positioning in front of stained glass window for P3.
Tank in Centre, with ranged moving clockwise around the outside to bait bombs.
Bait fire bombs by ranged stacking at ranged. Two bombs at a time .. drop one, move, drop second, move.
Blue arrows, split and point away from raid.
Fire breath targets a melee player. Melee should stack in a position where the flames won't hit ranged, but can be reached by them.
Remove the debuff by either standing in one pulse of the fire breath (preferred) or intercepting one of the blue arrows (be between boss and target - debuff from this hurts more).
Everyone gets a bomb and stacks to be sent to shadow realm - prior to that stack and nuke boss, use mitigation.
In shadow realm, collect max 10 sparks, and three white puddles to get back - tanks a little sooner to grab boss.
Move around the edge using markers to help.
Avoid swirlies and puddles.
Pick up bombs and get 10 stacks of Oblivion (stand in puddles) to go into shadow realm to drop bombs.
Breath .. try to bait in the direction we're not moving .. will leave puddles on floor and spawn adds.
CC, interrupt and kill adds asap.
Int 2: Tanks position boss opposite side to stained glass window, everyone else stack at window end. Will be knockback/pull forward .. don't fall off!
Meteors will drop at green marker/stained glass window. Use them later to get into "safe zones".
Black hole on one person .. big swirly .. place it over a couple of rocks (not all - edge) - stack to share damage and then get out.
Still bombs .. same as before. Use grey swirlies to go to void realm.
Big blue arrow .. point away from raid.
Blue star streaks .. get into a safe zone behind the rocks (light blue/white band on floor). BLOODLUST AT THIS POINT.