If you are going to use stylized brushes for forests you should use the same for mountains and other terrain features. I know that doing forests in the previous method doesn't look all that great with this particular style but for this type of map you can just use dark color blobs for forests and not worry about making sure that they seem 3d. This style combines faux shaded relief with a monochrome sepia tone so trees and swamps and plains don't need 3d relief - just mountains, hills, craters, and canyons...maybe river valleys but maybe not. I dig what you are doing here, though, and I like the very first one the most.