Your stats are fine for heroics, at least the easier ones. I hear it can be hard to get a group now at "fine," but people are idiots.
I would advise (just my opinions):
Change out your hit gems for Int in yellow slots. I like Int/SP for red. I personally don't like to gem for regen except when I have to, but if you are running low on mana and need to put in some regen hybrids, or need them for socket bonuses, just remember that MP5 is better than Spirit for Disc.
Change out that spell pen gem in your belt. Int/MP5 or SP/MP5 if you want the socket bonus, straight up Int if you don't care.
Change out the hit enchant on your gloves for the SP one.
I am sure you don't want to put expensive enchants on gear you'll be replacing quickly, but one round of quests gives enough shards for the Wintergrasp head and shoulder enchants, which can be nice fillers. Yeah, they give Resil, but they'll also give you a little extra SP for now, and when you're gearing up every little bit helps.
The Haste enchant is also super cheap for cloak if you think you'll be hanging onto it longer than a day or so.
Boot enchants are not that exciting for us overall, but I'd still replace that with Tuskarr's. Nice for getting out of the ouch as quickly as possible.
Edited, Jan 31st 2010 12:18pm by teacake