After seeking inspiration in old deck ideas, I lit upon this one: U/G allies, with Momir Vig and friends to help out. I artificially balance things, which may hurt in the end, but it gives me 20 monocolor creatures, split 10-10 (all either allies or changelings); 12 hybrid or multicolor creatures; and 8 non-creature spells, split 4-4. Xenograft might have been worth it, but I chose to keep it simple.  Call of the Kindred could be a game changer here. Energy Flux, holding two spots, was added on a lark and because I seem to face too many artifacts to ignore it. Ponder, Worldly Tutor, and Triumph of Ferocity all get me where I need to be faster. Berserk, of course, can put the finishing touches on an attack. The green is a little more expensive, but with a curve at 11/19/8/1/1, the overall 2.05 seems fine.