Personally, I'm more afraid of snipers than mages. We need to look at the results of the Green and Kamikaze units; maybe Shramu won't have to finish them off.
There's a theory that 6(?) skeletons are lined up symmetrically along the edges of the field; James will now check the right side.
I had different theories about the skeletons, one of which involves their positioning, not just in front of the walls. But we'll see.