You should add some necromancy or Dark Rituals. Demons are a bitch to get out.
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You should run some swamps in here. The likelyhood of you getting Verdant haven when you need it is relatively low. I did something similar, but didn't bother to make it standard. http://www.mtgvault.com/alicedroni/decks/simigari-proliferate
I'm definitely going to try to add some dual lands eventually, when I have the cash to waste Which is the reason have protean hydra rather than primordial hydraI've found evolve hard to rely on so i'd rather stay away from clouding raptor and keep mimic fluxmage for the moving ability. I also like fate transfer better because of some of the decks my friends play with have plenty of counters I can steal.