I also run a mixed group and its great. My only question would be the value of a Hunter. Sometimes you need to get up close and personal and the hunter has a problem with range and this may drop your dps a lot. I find that a magma totem, 2 x arcane explosions and a holy explosion are great in close range.My adive is to play the toons you want there are many great combinations its more about finding a strat that works for you and how you want to play.