[Modern] RUG Eternal Command... Suggestions, anyone?

I'm working on a variant of Eternal Command to play casually with my friends. Here's a link to the deck:
http://deckbox.org/sets/367259

I'm looking to improve this deck, but I don't necessarily have the funds to drop on a set of Tarmogoyfs. That's why there are Skinshifters in there instead. I've been contemplating replacing them with Scavenging Oozes; does anyone have a thought on that, or on anything else about the deck?