Avatars have minimum post values... just keep posting.
Personally I prefer to add 4 heals to the grass rush, (and yes I have it upgraded except for the heals by now, but that's besides the point
). The heals increase the elemental mastery rate quite a bit, and even if you can't heal to full, each heal is worth about 2 electrum at AI3 level. (if you win at 70hp you'll get 17 electrum, at 90hp you'll get 19).
For those of you without upped grass decks... only use 2-3 heals (replace cockatrices)