I can't say for sure that i know the best spec for pve but you can look at my current frost talent tree
:
http://eu.wowarmory.com/character-talents.xml?r=Magtheridon&n=Gigelu
Anyway, I think i will tune up a little this as:
- remove the 3 points from Permafrost and add them in the Winter's chill (+crit) or,
- maxed Elemental precision (less mana +hit).
Ofc, this is for "the frost way"
For fire I can reccomend this:
http://www.wow-europe.com/en/info/basics/talents/mage/talents.html?tal=2000000000000000000000050521201230333105312510230320010000000000000
Waiting for the other mages here to post oppinions.
Have fun and make a lot of biscuits