The Council of Blood

General Strat

There are 3 bosses in the fight that we will kill one at a time. When a boss dies, the remaining bosses gain an additional ability and heal to full. Dead bosses continue to cast one of their abilities.
Whenever a boss reaches 50%, you go into the dance phase. As the boss is reaching 50%, look for a beam of white light as that is where you need to be at the start of the dance. Move in the same direction as the npc dancers from tile to tile until they run off.
Healers - Towards the end of each boss, the raid will be taking more and more passive damage from Oppressive Atmosphere until it dies and stacks reset.
The boss abilities and empowerments are as follows:

0 Dead - Dutiful Attendant - Summons an add that makes the lowest hp boss immune. Kill it.
1 Dead - Dredger Servants - Summons adds that throw food at players.
2 Dead - Castellan’s Fury - When an enemy dies, all enemies within 12 yards are buffed by 100%.
Castellan’s Cadre - Spawns gargoyles that fixate players and gain a damage buff if they reach them.
Self Dead - Dutiful Attendant

0 Dead - Dreadbolt Volley - Interruptible shadow volley. If it goes off it can be dispelled.
1 Dead - Prideful Eruption - Players debuffed hit anyone else in 6 yards for 24k shadow damage.
2 Dead - Twisted Pain - You drop puddles whenever you take damage from Frieda.
Soul Spikes - Frieda hits her current target with 4 spikes over 4.5s. Each hit deals phys damage and increases damage taken from the spikes. Each spike hits the raid for shadow damage based on how hard it hit the main target.
Self Dead - Dreadbolt Volley

0 Dead - Dark Recital - Pairs players together. You have to stay within 8 yards of your buddy. Swirls will spawn under you that you both need to avoid by sidestepping them.
1 Dead - Waltz of Blood - The wall adds cross the room and stun players hit.
2 Dead - Two Left Feet - moving or jumping gives you a slow debuff that stacks. Standing still removes stacks.
Waltzing Venthyr - Swirls will spawn that must be dodged.
Self Dead - Dark Recital

Dancing Fever - ~5 Players get 3 stacks of Dancing Fever for 30s. Jumping removes a stack and hits the raid for 12k Shadow damage. All stacks must be removed or they die.
Killing a boss causes it to continue casting it's Self Dead ability for the remainder of the fight.