G1:
Guard/Zerker
Defiler
Warden
Coerc
Dirge
Brigand
G2:
Brawler
Mystic
Warden
Dirge
Coercer
Assassin
G3:
SK/Ranger
Mystic
Fury
Illu
Troub
Warlock
Is what I'd use. Maximise HP debuffs, Warden/Defiler will keep pretty much any tank up. Get a brigand in raid, and mages I'm still not a far of overall for boxing.