Tried one more idea, an Empathy deck with Water mark for purifies, and Forest Spirits for the kill. The problem? While it has high healing potential, and Thorn Carapace can clear the enemy field eventually, once again it takes too long to get set up. Best healing I was able to muster was 14 before I died, and he kept putting out new creatures.
5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bu 5bu 5bu 5bu 5bu 5bu 5c1 5c1 5c2 5c2 5c2 5c3 5c3 5c3 5c6 5c6 5c6 5c6 5ia 5ia 5ia
High end healing with all cards out is 24 per turn. Upgrading the shield would help quite a bit, but that's against the intent of this deck... sigh. Back to the drawing board.