Under Siege: No Dark Heart
Hold 3rd wave boss as long as possible, best to burn it to 15-20% first. " /say help " to spiritist NPCs at zone in to cure debuff. It helps to keep golem wall at far end of bridge to give you more time, you can also zone out players that have achieve to direct it towards fewer targets then zone in and finish boss. Tank will not get the debuff so use pet or 2nd tank for your achieve.
Enable Post Effects in Alt+O, display, advanced turns screen dark purple when you have debuff. Trigger should be "The darkness inside you begins to grow"
Under Siege: Don't Blink
Avoid golem wall, you can use the railing to get behind them after allowing them to move forward a few times. Pet tanking the 2 adds each wave can also work.
Under Siege: Stop the Advance
Burn down the waves quickly to prevent any DDs on friendly NPCs and prevent golem wall from hitting them.
