Do not stand in front of the boss even with the below mechanics.

Torment Unto Death

Tank buster and insta death for anyone else. Only the tank should be in front of the boss.

Zashiki-Asobi

Large circle AOEs appearing in sequence. Stand on end aoe then move into the middle (first) when it goes off.

Nightfall - Identify from sound effect

• Sword - Large cone AOE to random player - try to avoid, shit happens.
• Machine Gun - Directional stack up marker, stand in a line between boss and player (doesn't seem to matter if in front or behind the player however)

Kill adds ASAP

Selenomancy

Splits room in half, black and white. Adds a stacking debuff. 5 stacks is death. When on other side the stack drops and the other stack is applied. Orbs cause large donut AOEs. Adds can spawn.

Lunacy

Stack up marker, but wait until all attacks have finished.