Orgozoa

This is a two phase encounter where Phase 1 will focus on Desensitizing Sting stack management and Phase 2 will introduce more adds.

Phase 1

Desensitizing Sting - This is the main tank swap mechanic of the fight. The boss deals very high melee damage, and with each hit you will get a stack of this debuff. Each stack of the debuff reduces damge taken by 10%. At 10 stacks you will die.

Incubation Fluid - Periodically throughout the fight this will be cast on random players. This is a permanent debuff that deals Nature damage every second. 

Arcing Current - This will be cast on a player with Incubation Fluid, if they are near any other player it will chain to them. If it chains to a player without Incubation Fluid, they will now be debuffed with it.

Dribbling Ichor - The boss will channel this over 10 seconds and will spawn circles on the floor in a set pattern. Dodge these circles by following the pattern.

After each Dribbling Ichor cast, the boss will spawn Zoatroid adds. These need to be tanked by the tank with Desensitizing Sting stacks.

The adds will need to be tanked away from the boss as any add within 15 yards of the boss will take 50% less damage and deal 50% more damage from its Chaotic Growth aura.

When the Zoatroid dies it will spawn a Amniotic Splatter puddle which needs to be soaked. This deals a large amount of Nature damage. This damage does not split, this should only be soaked by the tank with Desensitizing Sting stacks.

After three casts of Dribbling Ichor, the Intermission will begin.

Intermission

All stacks of Incubation Fluid will be removed from the raid.

The boss will run to the bottom of the room and begin to cast Massive Incubator. If this cast finishes it will be a wipe.

Dodge the Unstable Eggs - If you hit one you will take damage from Eggsplosion and be knocked back.

Avoid the Hatchery Moulting Circles - If you are hit by any you will be knocked back.

Avoid the Jellyfish Floating in the air - If you are hit by any you will be killed from Electro Shock.

Phase 2

Instead of Zoatroids spawning this phase, the boss will summon two naga adds (from a pool of 3):

Zanj'ir Myrmidon will cast Aqua Lance - This will target a random non-tank player and after 4 seconds a Raging Rapids puddle will spawn. This player will want to move to the edge of the room to maximise encounter space.

Azsh'ari Witch will cast Conductive Pulse - This needs to be interrupted as if this cast is successful all raid members will be stunned for 3 seconds. The Azsh'ari Witch will also deal damage to random members of the raid with Shocking Lightning.

Dreadcoil Hulk will cast Powerful Stomp - This deals large Nature damage (tooltip says Physical but its a Nature spell) to players within 14 yards. This damage is split with everyone that is inside of the area. If no players are hit it will cast Reverberating Tremor which is likely a wipe.

[Heroic] The boss will continue to spawn Zoatroid adds

Mythic

Dribbling Ichor - Deals significantly more damage.

Arcing Current - Now hits all players rather than just a single player. This means the raid members with Incubation Fluid will need to spread out prior to the cast.

Call of the Tender - The boss spawns Zoatroids more frequently. This will mean that your positioning of these is vital to ensure they are within cleave range but not receiving the damage reduction from the boss. The boss has an abnormally large hitbox so you can cleave to the adds whilst hitting the boss if positioned well.

When starting your tanking cycle on the boss make use of defensives or the Azeroth's Undying Gift essence

Ensure you do not reach 10 stacks of Desensitizing Sting

Coordinate your swaps to ensure there is no accidental stack mis-management

Phase 1: Swap on 6/7/7/7/7 stacks
Phase 2: Swap on ~7-9 stacks

Brewmaster Monk

Black Ox Statue can be useful on this fight to have adds grouped up and to act as an AoE taunt if you need to swap

You can solo soak the Powerful Stomp with Zen Meditation, Fortifying Brew or Dampen Harm

Vengeance Demon Hunter

Ensure you have charges of Demon Spikes available for the start of your tanking cycle of the boss

You can glide over the ramp in the intermission phase to reach the bottom faster, but be aware of the Jellyfish (Please note: this is very risky)

You can solo soak the Powerful Stomp with Fiery Brand

Protection Paladin

Ensure you have charges of Shield of the Righteous available for the start of your tanking cycle of the boss

Blessing of Spellwarding and Divine Shield can be used to soak the Amniotic Eruption with 0 stacks of Desensitizing Sting

You can solo soak the Powerful Stomp with Blessing of Spellwarding, Divine Shield, and Guardian of Ancient Kings

Protection Warrior

Ensure you have charges Shield Block available for the start of your tanking cycle of the boss

Spell Reflect can be used to reduce the damage from Amniotic Eruption

Guardian Druid

Ensure you have rage pooled for the start of your tanking cycle on the boss to start with multiple Ironfur stacks

Stampeding Roar is useful to complete the intermission phase faster

Blood Death Knight

Ensure you have Vampiric Blood or an External for the start of your tanking cycle of the boss

Grips the adds away from the boss to prevent them from gaining Chaotic Growth

During the intermission phase all knockbacks (Eggsplosion, Hatchery Moulting) can be negated with Death's Advance