Patrolling the colossal machinery of Manaforge Omega, the Plexus Sentinel ensures that energy from the shattered world of K’aresh is cleanly filtered into the manaforge’s central chamber. As the first line of defense, all incoming energy must be sterilized. All pollutants must be purged. 

Single target fight.

Additional information: https://www.wowhead.com/guide/the-war-within/raids/manaforge-omega/plexus-sentinel-boss-strategy-abilities

Tactics

Phase 1

• Bloodlust on pull.

• Tank where he starts.

• Circle debuffs (traps) .. players place to sides of room.

• Tank Obliteration Cannon.  Taunt swap - target place to the back and side of room.

• Group soak - everyone soak.  (HEROIC: split into two .. take turns soaking)

Phase 2

• At full energy everyone stacks in middle for pushback.

• Move quickly towards the boss avoiding traps.

• Use cloak extra action button to get through arcane wall.

• DPS through the boss's shield and interrupt cast to get back to P1.