my mage is usually my top DPS toon, despite being the worst geared. I added mana sapphire to my dps macro, and still pop mirror image manually, but its a TON of dps. I have been spending some solo time with each of my toons, tweaking macros, UI, gear, gems, etc. I recommend running pugs solo with the new dungeon finder, helps you learn more about your class. Ive seen mages in ToC 10 doing 8k DPS on bosses, and on Twins like 12k... Mages can dominate the dps charts when geared.