Armoury Crate (New system - add your results for the currently):
The easiest way to win this fight is to use a sac-pull method to only pull the Boss monsters, ignoring and de-aggroing the weaker monsters. Monsters have Alliance hate only, so make sure the pullers are outside the alliance before beginning. (This is under the old system)
Only the boss needs to be defeated in order to win. Doing so will instantly kill all other monsters.