Brooklyn Rage Mage
1)
Nulling with the crown: If you leave the Yellow/Green Maze, 100% Room, Crypt, or Bloodlust Chamber, the instance resets a certain area, forcing you to re-clear certain areas. Like for instance, nulling from Green Maze with crown glitches the instance.
2)
Heal Tanking and Aggro: The use of a Heal Tank is to be a healer for the crew. A Heal Tank (Known as Aggro to the uneducated) is necessary for every part of the instance.
1) Once, on a Tuna run, the captain gave me crown after we wiped in the middle of GR. I hadn't noticed and as they said 'Stay there until we run back' I clicked awaken, presuming someone else would've stayed back. The YM didn't reset though. However, it did a couple of hours later... Not sure so much if that was because of me.
2) Well, I guess YM doesn't always need a tank. I've been on many runs in which we skipped out on a tank and even sometimes we did speed runs using a whole different set involving Diagnose + 2 or 3 passives each.