I like this deck a lot. I have my own infect deck that has low converted mana costs, but it's more of a turn 4/turn 5 win. For your deck, I would exchange your
Blanchwood Armor for
Rancor. It doesn't have the continuous growth like the armor does, but it does +2+0 and Trample for only 1
forest mana, and is returned to your hand if sent to the graveyard from the battlefield.
Two thumbs up for this MODERN infect deck!