it etirley depends on what ur planing to do with ur mage frost ide say would be better for a pvp lover ( me :P) its also great for mass grinding fire is good for instances and if u sppec archain fire instant piro is the bomb archain ehhhh ive never rly seen a achain mage but there 100s of combos of specs to chose from but if ur archain ide sugest definatly getting piro :P