Rather than looking at your gemming, I'm just taking a peek at some things I noticed on your armory :
- Low haste and Nibelung are not compatible. I don't know what it's worth for a mage, but maybe you can consider this.
- Onyxia's ring is meh, you get the same thing with haste for 35 triumph badges.
- T9 legs are crappy, try and get your hands on crafted 264 legs (and boots), yep I know it's 13 primordial saronite, but I had to say this.
- Maybe try and change that wand also.