At 20 Shamens get our dogdog pet..... I wouldn't let the pet play much into your choice as he is highly AA modified and really won't be useful until the higher levels. A strong benifit of the pet in the PvP world is that although he doesn't do much damage he can still interupt, and on the str AA line you can give him the abilitiy to interupt as well, that all being said, he's bright white (ghost dog) and sticks out almost as bad as the Conj's mage pets.