I do 22k on a dummy with my ilvl 390 mage, so maybe you're a low if your closer to 24 than 26. 26 would seem right for your gear. Reforges, gemming, etc all looks good. I use reckless instead of artful ember topaz, but you're already at 2100+ haste, so switching isn't really necessary. Although if you ever swap out the bottle for one of the DS int trinkets you may want the extra haste from switching gems.