Here's a reply I gave to a level 70 mage who was asking which mage build is better ice or fire mage, I think it'll help in this discussion...
"I'd say they are equal, it's what you prefer and what gear you have to support each build. If you prefer to kill moderately fast (dps) fire's the way to go, but if you prefer to do heavy damage but not necessarily fast then ice is the way to go. Since you have all the Mage moves your gear is really what matters now; consider having rings that will top out your skills (20+/20 etc... I believe that's what your max is at level 70)...
BTW in a long run a mix build will help you the most... fire for attacks and ice for its shield this way if and when you get to dragon armor the added points to moves wont be pointless...
![Laughing :lol:](./images/smilies/icon_lol.gif)
but what would I know I'm a druid..."