Guardian tank, 3 healers(1 bubble stun) either 3 smashers 1 gunslinger/sniper or 2 and 2. This should and will be one of the best setups to combat every team running 3 healers now.
You'll be able to have 2 guarding a node, simply because you have 3 healers obviously. I'd recommend one of your smashers be a sentinel and able to respec combat/carnage for huttball.
Overrated. 8 scoundrels