Well don't forget about resto shaman's famous chain heal, which would easily heal your target pet, and fill up the others if there is any AOE damage. The shaman would also supply a large amount of buffs that your hunters would benefit greatly from (Strength of Earth and Windfury will greatly buff your both your hunters and your pets) and also heroism, to add your insane beastial wrath. You'd probably be able to do any heroics, if you have spec one hunter's pet into tenacity. I saw a video of a pet tanking gruul =P