Kaya, Ghost Assassin (win) I have done a bunch on this already
The card art for Belle Accomplished Mystic is absolutely mystifying, but when you add Shift and healing to her gameplay, you get the ability to heal rapidly for a low ink cost, assuming you already have a Belle in play
Exploration for four mana is a bit spendy, but when you solve it which is really easy to do you get a green Future Sight effect that lets you play the most common green build-around cards off of the top of your library
Volo, Guide to Monsters Speaking of making copies of monsters in the board, I believe with that a varied creature-type deck, Volo, Guide to Monsters does a better job in churning out those tokens on the board
Trynn, Champion of Freedom and Silvar, Devourer of the Free offer a viable alternative option for your humans, and they may prove more popular and dynamic thanks to the partner mechanic