I would drop the painful quandary and go for the throat and put in 4 bladed pinions and 2 viridian claw
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Blasting Station+ Enduring Renewal + (Ornithopter or Kobold of Kher Keep)= Infinite damage. Enduring Renewal + Wild Cantor + Genesis Chamber = Infinite Creatures. Faceless Devourer + Faceless Devourer + Faceless Devourer + Genesis Chamber = Infinite Creatures
Mana cost is low enough for a fast control. Throw the Mimic vats in the side board, they will be more of filler if you use them with only 4 creatures. black sun's zenith if help full but put it in ur side board and exchange it for ur go for the throats....just switch them out if you play against a artifact creature deck
+2 Death Grasp, +2 Tainted Sigil, -Baneslayer Angel (yeah its has lifelink, but it is easy to take down in some cases), - 2 Felidar Sovereign (Life Link and game win but again easy to take down if need be) It looks like a good deck i would like to see it played check out mine (http://www.mtgvault.com/ViewDeck.aspx?DeckID=71050) same idea different way of doing it im really running my BW deck its funny to watch people react to some of the combos that accure with Death Grasp+ Sanguine Bond + Tainted Sigil with enough mana its GG