Tank boss at the side of the room.
Bloodlust on pull.
Avoid black lines.
Tank swap - corrupted strikes.
Kill Quasar adds before they reach boss. They drop a black puddle on death. Avoid.
Dark Eclipse debuff - if you have it, run over a black puddle to remove. Causes raid wide damage (but less than the debuff).
Clearing Dark Eclipse debuff marks you with a small yellow ring .. move away for it to drop off.
At 100 Energy, boss casts Massive Bang. When close to 100 energy kill ONE ONLY Unstable Matter. This will spawn little swirls, one player per swirl to avoid the damage from Bang. Watch out for the pull during the cast.
Everyone who stays in circle goes to a downstairs phase - constant raid wide damage, until P1 starts again.
Kill boss before he casts Massive Bang for the 4th time (only three Unstable Matter adds).