Use a zerker, a paladin and a bruiser.
you get the group buffs with very little stacking, you get healing on 2 of the 3 tanks.
zerker zerker zerker creates a whole mess of redudancy.
but tbh, if you don't go all tank
zerker
inquis/templar
brigand/swash
spec the brig/swash for the STA line for tanking as well. Templars and inquis wear plate and can take a great deal of beating, and you still get the zerker dps and taunting...
and again -- you get diversity of buffs instead of 3/4 of your group buffs being pointless due to stacking.