The video below states it shows heroic tactics, but as far as I can tell, these also cover Normal as well.

Phase 1:

• 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).

Int 1:

• 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.

Phase 2:

• 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!

Phase 3:

• 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.