First of all, your manabase frightens me:
1 Lotus Petal
1 Mox Diamond
1 Sol Ring
1 Grim Monolith
4 City of Brass
2 Gemstone Mine
6 Island
3 Swamp
1 Scrubland
1 Tundra
1 Underground Sea
1 Strip Mine
3 Wasteland
It shouldn't be this hard to support three colors. Do you have a distinct lack of duals and fetchlands? I also feel that some of your artifact mana is questionable. Your deck wants permanent sources, so Lotus Petal should probably be something else. I would probably run something close to:
1 Sol Ring
1 Grim Monolith
1 City of Brass
1 Swamp
4 Island
4 Tundra
4 Underground Sea
4 Polluted Delta
1 Strip Mine
4 Wasteland
It would be extremely helpful to see a sideboard, since I'm assuming that Stroke of Genius. Although Braingeyser surely works as a win condition, you should make room for more blue bombs, such as Deep Analysis or Future Sight.
Has Panoptic Mirror really been that good? I would drop that, a Morphling and enlightened Tutor for Vampiric Tutor, Deep Analysis and Future Sight. Also, make sure to have a Lim Dul's Vault in the board.
I think the number of scepters is fine, but I'd try to increase the numbers of imprint targets, possible dropping diabolic edict (you already have swords, if there's lots of morphling in your meta, put it in the sideboard) and zuran orb for another brainstorm and possibly an impulse.