I played a Pally/Priest/Hunter and it was very easy mode. I'm currently debating between trying out a 5-box Pally/2x Priest/2x Hunter or Pally/Priest/3x Hunter.

Pally = Tank/Rez/Buffs/AoE
Pet = Offtank(s)/DPS
Priest = Heal/Buff/Debuff/Rez
Hunter = DPS