1 Ele Shaman, Boomkin, Mage, warlock, and Pally tank.
2 2 warlocks, Shadow priest, Ele shaman, and pally tank.
3 2 mages, Boomkin, Ele Shaman, and pally tank.
4 Warrior, Rogue, enh Shaman, Holy priest, Pally tank.

Or let me know if you guys have a different makeup in mind.