You won't be controlling much without graveyard control. Withered Wretch is a must. You won't be controlling much without Wasteland, either.
Its much better to use a creature and beat down rather than use consume spirit. Phyrexian Arena is too slow. Dark Confidant solves both problems. If you're saying "well I need the lifegain because of the lifeloss from the draws", keep in mind that you cannot stop a topdeck insta-win (like your opponent drawing a Yawgmoth's Will will all that fun stuff you put in the graveyard). You have to have a way of killing your opponent as fast as you can before something that you cannot handle pops up. In other words, you shouldn't let the game last long enough for the lifeloss to hurt you in the first place. You're better off with a huge beatstick, as pokerbob has mentioned.
You don't need Mana Vault. You don't even have a spell that has two colorless mana.
Chainer's Edict is a sorcery and it never gets cast for a flashback. If you must have it, use diabolic edict instead.
Innocent blood kills your own creatures.
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"Sometimes, the situation is outracing a threat, sometimes it's ignoring it, and sometimes it involves sideboarding in 4x Hope//Pray." --Doug Linn