Wilt-Leaf Lieges instead of the Boartusks is the obvious change. 2 more Vanquishers. Door of Destiny or Coat of Arms are possible additions as finishers. The Gaea's Herald might be a sideboard only card. Gilt-Leaf Ambush is a possible addition at the 3cc spot, and as poor man's removal.
And the general aggro deck thought process is that spot removal helps greatly. Not sure how that will fit into mono-green. Most elf decks I've seen splash black for Terror or Eyeblight's ending or Shriekmaw.
Probably mid/late pick since I expect it will be there still.
I would be sad if this made my 23.
A little above "fine" then.