Easy call go for 4x shaman 1x pali, you want something other then cloth users in your group.

4 mages and a priest would not be fun as the mages are far to squishy, Warlocks are a bit better but they are still cloth users. I'm having fun with 1 palli, 3 mages, and a Priest but 3 classes is hard for a multi-boxer newbe like me.