Hey Cathias,
I'll just take a quick look and hopefully we can find something.
- Gemming seems weird to me, a higher ilvl (and if 1 or 2 RPPM trinkets and/or legendary metagem) 2 Haste > 1 Intel. But at your ilvl I don't think so. You should gem accordingly, I have 13 ilvl more than you and I don't have that much haste. But again, you have LOTC, so its not that high.
- NT uptime looks great, Evo buff too. So there's little to no work to do there. Good job !
- Glyphs are okay, you certainly use the 3rd slot as a wild card and changed it depending on the encounter right ?
- It obvious you are wildly undergeared but you cleared NM already so gear will come, and your dps with ramp up fast.
You should take a look at Kuni's frost guide its very well written and has tons of great info :
http://www.mmo-champion.com/threads/...Mage-PVE-Guide
Thanks