I have a 70 hunter and a 70 shaman. Hunter will be mostly bm, and shaman will be full resto (or maybe elemental/resto). I am going to give this duo a try, because I get the following features: decent ranged dps and a buff to agi and pet meelee attack power, a pet tank with around 10k armor, (earthshield ?) and heals for said pet, wipe recovery, extra dps / cc with elementals, and so on. I am not saying that this is the best combo ever, only trying it because I can do it without much work, and that said, it does not look too bad. Having an enhance shaman would rock as far as dps goes, but I am not sure the pet would hold the aggro, and it would probably be quite harder to play.