R/B Deck for play at a small game shop. Any suggestions?

I'm not looking to spend a ton of money on cards, just to maybe refine it a little bit. It went 2-1 in a 10 person standard today and got me fourth so it's not like the meta is crazy here or anything. The deck it lost to was a white human tribe deck, it also beat another white human deck in the round after. Weird to see tribes decks again.

anyways here's the deck: http://deckbox.org/sets/356001