The following exploit which worked on the last rev of our mangos server (3.0.9) works on : HKM,Council,Twins,BT trash,SWP trash
And a lot more bosses which have strong mobs around them .
1) Paladin need's to cast Hand of Protection on the Warlock
2) Warlock need's to cast Seed of Corruption on the boss
3) Warlock need's to make 1.5k dmg to the boss all while in the bubble
4) Warlock dies , adds atack boss -> boss atacks adds
5) Loot and enjoy
In a few cases such as in SWP ( Twins ) a raid grp is still needed to kill both of them , but this method will clearly make the encounter much easier .