Chuckle.. all valid tactics but not really as necessary as when the raid first came out...
IMPLOSION....
You get everyone... casters, clerics, mele in a ball on Sulu's tail.
Cleric hits implosion.
Then you roll thru spells.
Mass cure light
Mass cure mod
Mass prot
Repeat
Sulu goes down in 10 sec cause everyone is still beating on him.
Most bats die when they get close, so party takes no damage.
Quest over.
If you break eveyone off Sulu it takes forever to deal with him, and everyone is running amock and taking damage from the bats. Its chaos.