Smallpox is pretty good. Gotta run around 24 land to run it though. Running 24 land also has the benefit of making Raven's Crime that much better.

25 is the golden number when it comes to Pox

I just dont really want to rely on Smallpox ... I feel like this build is pretty solid and idk what i would take out to make room for it all... that and Raven's Crime is one of the first cards that I dump to make room for sideboard cards...

I've seen good come from 1 Raven's Crime and 1 or 2 Dakmor Salvage but if dredge isn't too appealing then its cool. Works well too with Small Pox. Also Phyrexian Obliterator is only mid game... I know it's meta but its meta for a reason, have you considered some Augur of Skulls in replace? They'er excellent chump blockers and are more wrench minds when they need to be.

4x Urborg, Tomb of Yawgmoth would allow you to run 4x Mutavault which would speed up your victory and just win you some games.