| You should have appropriate mods which have timers as to when he will be whirlwinding. At about 4 seconds left till whirlwind, all melee should run the hell away lest they be killed. Everyone else should be at max range for either healing or ranged dps.
It's not hard, just make sure you're insanely spread out. Even go so far as to create teams of people for each "corner" or "side" of the room so that wherever someone is standing there will be a healer there to fix them up. |