Yeah like you said lose one of the Grove of the Guardian at least for another forest, two of the guardians is more than enough trust me I know from experience I used to run a populate token deck before my green and white took a turn for the better and became what it is today, check it out if you would like its my main brew a The avengers of Selesnya aggro deck. +1 to ya for this build.

I understand this is your brew but I woul go with 2Trostani, Selesnya's Voice and I would also drop the 4Wake the Reflections for like 4Heroes' Reunion . I would also try to main Voracious Wurm which also fits the decks title. Armada Wurm is nice but the other one might be nicer for this build. Also I would go with 4Scavenging Ooze & 4Selesnya Charm . I hope this helps I have a Selesnya deck as well that's pretty solid so feel free to check it out and comment on it if you like

Fiendslayer Paladin is nice as well, but i'm sure you knew about that one though.