A dex-wand user-mage!
DEX:INT;CHA = 5:2.5:2.5 or 6:2:2 since the mage will use wand!
Use all the skills that require wand, including the passive.
Will you include stats on items? If you do, for sub-stats, go for pure dodge and attack speed!
For gems, pure block rate.
Mages are squishy chars. I dunno if that kind build will work. >.<