Not that my experiences have been all that great with a modern infect deck but I would make the following changes:
Run 4 of the following:
Glistener Elf
Ichorclaw Myr
Mutagenic Growth
Vines of Vastwood
Might of Old Krosa
I'd trade 4 of Yavimaya Coast for Temple of Mystery: You take the hit, but you don't have to wait a turn when it comes in. Could be useful if trying to win fast.
I'd trade 4 of Giant Growth for the Thrummingbirds. I don't see how they help you and Giant Growth is a great 1 mana growth of 3/3 for the turn.
I'd dump Blight Mamba, and Corrupted Resolve (Maybe good for the sideboard).
I'd also look at adding 2 Pendelhavens instead of 2 Forest.