I used to run pally tank, 3 mages and my druid healer. It really sucked without fear totem and poison and disease cleanse totem. I subbed one mage out for my shaman and it was pretty good. I had a better set of resist, fear totem ect.. Right now I am gearing my other toons up so I am running pally tank (may change to my dk because the pally needs no badge gear) 1 mage, 2 shaman, and my priest. The group is pretty solid. I like being able to chain heal with my two shaman to help out the priest if needed. The priest healer is much less button smashing over my druid. I think my ideal group setup would be pally tank, mage, shaman, priest, and lock. I love having mage buff, food, and ports so I think all groups should include 1 mage.