Skolex, the Insatiable Ravener

This is a single plase encounter where you are aiming to not be overwhelmed by Empemera Dust stacks and avoiding all of the mechanics. In order to reset your Empemera Dust stacks the ENTIRE RAID must stack together which will force the boss to cast Ravening Burrow and move to your location, if you are INSIDE this knockback your stacks will be removed.

The basic flow of the fight is: 

Tank Combo> Retch > Tank Combo >Retch >Raid Stacks to Move Boss > Soak the boss hit (Repeat)

Empemera Dust - Stacking DoT by various mechanics. Can be reset with Ravening Burrow.

Dust Blast - The furthest 3 players (and all players within 10 yards of them) are hit with this on each hit of the Tank Combo. 

Devouring Blood - Skolex will fire bolts on melee player locations. Failure to move will apply a DoT and reduce your Haste by 33%!

Retch - Targets a random ranged player and make them the centre of this cone. Move out of it when it spawns to pre-designated locations.

Ravening Burrow - When all players (including Melee DPS & Tanks) are stacked together Skolex will burrow underground and reemerge at this location. Getting hit by the boss reemerging removes all Empemera Dust stacks.

Wormhole Jaws - Stack on your co-tank unless there's a Tank Combo happening. If there is no other player within 10 yards the tank will be hit twice.

If you Dodge/Parry the attack, Wormhole Jaws will not be triggered. 

Tank Combo

At full energy a 3 part Combo will happen. The hits will either be Rend or Riftmaw. Swap on each hit of Riftmaw.

Rend - Big stacking Bleed.

This bleed can be removed with Blessing of Protection, Stoneform (Dwarf Racial), Fireblood (Dark Iron Dwarf Racial) and Phial of Serenity (Kyrian Potion).

Riftmaw - Large Shadow damage hit and applies debuff to increase damage taken by Riftmaw for 500% for 6 seconds. Swap after each hit! 

[Heroic/Mythic] Rend and Riftmaw will be applied to everyone in front of the boss.

Skolex Swing Timer: 2s (Curse of Weakness 2.4s)

Brewmaster Monk

You should ideally be the main tank for this fight as if you Dodge the initial hit from Skolex your co-tank will not be hit by Wormhole Jaws.

You will have Celestial Brew available for each Tank Combo.

Vengeance Demon Hunter

If you are playing with the Fiery Soul legendary you will have Fiery Brand available for every Tank Combo.

Fiery Brand if used part way through the first cast of the Tank Combo will last for all three hits.

Use Infernal Strike to move to the raid stack point. 

Protection Paladin

Divine Shield and Blessing of Protection will remove the stacking bleed from Rend.

Alternate using Ardent Defender, Guardian of Ancient Kings and your free Word of Glory charges for the Tank Combos.

Protection Warrior

Spell Reflection can be used to deflect a stack of Ephemera Dust, however it is best used to mitigate damage from Riftmaw.

Rallying Cry is best used to help the raid survive whilst stacked together and getting knocked back.

Rend and Wormhole Jaws can be blocked.

Guardian Druid

Stampeding Roar is useful to help the melee move to the raid stack spot.

Blood Death Knight

Rune Tap and Anti-Magic Shell are best used to mitigate damage from Riftmaw.

Deaths Advance negates the knockback from Ravening Burrow.

Wraith Walk to move to the raid stack point.