Pharika help

Been toying around with a deck idea built around Pharika and her ability of generating snake tokens, essentially turning her downside into a downside for my opponents. I've built it as an enchantress with some effects that will kill the tokens upon their entry and then force them to discard or sac another creature/land etc. Seems cool in theory but not sure how it would work in practice. List is here: http://tappedout.net/mtg-decks/pharika-god-of-snakes-1/ Any input or suggestions would be awesome.