I ran two mages under RAF, and never needed to go anything but fire due to the massive dps output. 2 sheeps and 2 Frost Nova for control, 2 Pyroblast - Fireball - Fire Blast and things generally dropped before they could reach me. For the nasty fireproof area in Dustwallow Marsh, used Frostbolt + Arcane Missiles and again they dropped just as they reached me. I'm thinking of respeccing PoM Pyro for outlands, but not sure if I need it over the increased overall dps of fire for questing purposes (will probably want it when I am doing more PVP).