Sorry for budget reasons, I use 4x commons, 2x uncommons, 1x rares, 1x rare mythics.
This way all my decks are competitive between them, and I mostly need to buy a 36 booster box.
Kalonian Tusker was included in this deck, but since it is GG, I would like to change it.
Also, I already have 9 2CMC creatures (+4 tokens from Selesnya Charm and Call of the Conclave ).
However If you have some ideas to replace those 4 Centaur Healer, I would be glad to hear them.