Yeah no RAF will be terribly slow with mages. Especially since you have no healer. I 4boxed 3 arcane mages/1 priest combo and that made it more bearable. 3 arcane explosions plus a holy nova to help heal as I chain pull large clumps of mobs to AOE down.. Worked pretty well. Since you still have a low level team i would suggest maybe adding in the priest.. it will jump your survivability way up.. At later levels you can drop a light well for when you finish AOE'ing an area or Circle of healing when you get beat on a little more than you like.