A couple of suggestions from a mage on pvp server:
1 - dump winter's chill and get arctic winds. 5% more dmg guaranteed and 5% less damage taken is much better than a BUILDUP to 10% increased crit chance. By the time you get to 5 shots, you could have done 25% more damage (than 1 spell) and taken 5% less.
2 - Frostbite is a NECESSITY for PVP (if you're going frost). You want to be able to freeze people.
3 - Improved blizzard is useless in pvp. You won't be mass kiting players. Blizzard is for pve. Change it for 3 points in permafrost, the added 10% snare to your frostbolt will be noticed.
4 - Elemental precision, get it.
5 - Arcane Meditation is wasted. 5% you won't even feel.
6 - Points in Arcane Missiles are wasted... unless you're taking the 100% route.
7 - I agree with the poster above, counterspell silence in PVP is needed.
I would suggest a build like this:
http://www.worldofwarcraft.com/info/classes/mage/talents.html?2300540010200000000000000000000000000000000000535323310205010001541 or even heavier in arcane to give more firepower:
http://www.worldofwarcraft.com/info/classes/mage/talents.html?2500550010200152300120000000000000000000000000505320310205010000000
You get much more durability with the 1st build, and more firepower with the 2nd. Hope this helps!
Edited, Aug 21st 2007 8:43:08am by kraznorafk