I would recommend frost spec. Its very user friendly for a boxer. Also, I have read that frostfire spec is really not good unless you have the gear for it. Unless your mages have a lot of crit and spell you are better off with another spec. Personally I didnt want to use any spec where I had to watch for hotstreaks or certain procs to happen in order for my dps to be maxed. With my frost spec all you do is spam frostbolt. It makes boxing the mages much easier than any other mage spec.