Works very well for AI5, but I don't think this is a viable FG deck concept. There's a reason why most of the popular FG decks include Quintessence or do not rely on keeping a creature alive - many FGs are tailored to devastate decks (like yours) that just rush with creatures.
As an AI5 deck, this doesn't need much help, because it already works great. Have you tried adding 2 Improved Steals? There are a lot of shields that are just plain annoying when they come out.