I think thinking in the upgrade path is pretty premature right now...
As hrmmm said, nice deck to be your first one, and in your place I'd do what they say, but I wouldn't upgrade this deck.
If you don't have a FG grinder you should make yourself one, if you do have one, you might have to change the strategy, since there are more entropy upped cards worthy of a place in this deck (improved mutation, Werewolf and a darkness mark, chaos power and sparks*?*)