Nice deck. Have you thought of
Sylvan Caryatid instead of Wall of Deniel? With shroud you cannot target the Wall with
Assault Formation's first ability, while with the Caryatid you can do it. Also, Caryatid is another ramp card in our deck and looking to the actual modern metagame there are a lot of remouvals, so i think that hexproof is a very important ability.