i guess you are talking about pvp? ^^
tbh, i don't think you should look at the burst output a team can make, but at the survive chances ..
that is my oppinion though, like pally's have divine shield, HEAL HEAL HEAL and go again, dk have that green shield but cannot heal.. i think, except for in blood spec
however, i may be wrong and i probably am, you may(must) correct me

greetingz
tank