I "drive" the hunters with the priest. I set healing keys for F1 - F5 and pets are Shift+F1-F5. I have 2 hunters dps buttons and a crap ton of utility buttons (traps, auras, etc). I specced all pets to be tank and just let them all fight for aggro and then I heal whoever is taking damage. With the 75% AE reduction pet talent, they tend to not need much healing unless the boss is massive melee damage. It works out really well. I really have not ever worried about aggro on the healer. I can spam heals as soon as they attack the mob and it still wont come for me. Good stuff

edit: oh and this is in the wrong forum, my bad dog!