This deck has an uber positive aggro matchup, and a good non-jace control matchup. It's only problem is combo (perhaps storm and painterstone). So, why not shoring up the combo matchup with 4
Chalice of the Void and
Sphere of Resistance? As for Jace 2.0, there's
Beast Within which is a green vindicate and giving an useless elephant to your foe.
And Zuran Orb must be in main deck. It's tutorable with Tolaria West and has a great synergy with Clacial Chasm against fast decks.
Another thing I'd like to say, is that Mishra's Factory sucks. Creeping Tar Pit and Treetop Village are the way to go imo.