Using powerful sigils and technospells, Forgeweaver Araz controls the flow of energy from the forge into Dimensius, feeding the void lord to bring him into our plane. An ardent follower of the All-Devouring, he strives to see his work through—at all costs.
This fight is a ramp up in difficulty from the previous three bosses. It's a two phase fight with two intermissions, with Bloodlust after the first Intermission.
See Wowhead for more info: https://www.wowhead.com/guide/the-war-within/raids/manaforge-omega/forgeweaver-araz-boss-strategy-abilities
Tactics
Raid Prep for Heroic: Split into two groups
Phase 1
TANK boss where he starts.
First collector will activate and shoot out discs - avoid.
Some raiders will have purple arcane circles on them. They need to stack under boss as they will spawn adds.
Stop adds getting to collectors. Use stuns, knockbacks, etc. Kill asap.
Group soak on TANK.
Spawns a large echo add (HEROIC: Add gives boss and itself a shield whilst within 20yds)
HEROIC: TANK swap, TANK with soak moves 20+ yds away from boss with their soak team (half the raid) and nuke add.
Echo add will echo boss abilities.
Once Echo add is dead, drag boss back to centre of the room and repeat.
TANK: Stacking debuff Overwhelming power - taunt swap every 2 or 3 stacks, or when it falls off.
Intermission 1 (at full energy)
Boss becomes immune and moves to console.
Everyone nuke collector with highest energy, then move on to the next and after that the final (OR split and nuke all)
TANKS pick up adds and bring to collector to cleave.
Dodge lines on ground.
TANKS may need to taunt swap on adds as they have a stacking buff the longer they're on the same target.
TANKS can use their adds to intercept collector beams at 100 energy.
Once all collectors are dead, boss becomes attackable and takes increased damage - BLOODLUST (or at P2).
After a 12 seconds boss will go back to P1 then Int.1. Second time will go into P2.
Phase 2 (25% HP)
Knockback. Position to get knocked towards the entrance of the room.
Boss spawns giant black hole that creates a raid wide dot and tries to suck you off the edge.
Move boss to section furthest away from black hole.
Purple arcane circles need to be dropped as far from black hole as possible - nuke adds before they reach it.