Heres some tips for mage talent trees.

If your going to solo everything go full frost, it saves mana and u still get good dps/damage.

Full fire for Battle Grounds and Crowd Controll in dungens.

And finally the only usefull mage spec Arcane or w/e its called, arcane is hands down the best spec because it lets you sheep stuff and it helps to make better fod/water hehehe...