This is just idle curiosity, but I've tried to find it online before and my google-fu fails me so all I find is WoW or Spirit Shaman. I'm guessing tier 2; they have a more limited list than cleric and worse combat skills, but they are still full casters and they get a druid's animal companion (but not the buff spells to go along with it). So I decided I'd ask the playground their opinion because I know I'm not the best judge of this.