I'm using:

1 x Paladin consecrate - /laugh @ %t
1 x Shaman healing totem, stoneclaw totem, fire nova totem (will work magma totem into the rotation when I get it).
3 x Mages AoE their little hearts out.

I've yet to have the mages take any damage..but they are only 21 right now too.. Things could change later in the game.