Which units would you like to replace/add?

Ents are alive and don't fall apart. There's a peasant, and there's a zombie. They look the same, but both exist. Also, there are 4 types of dragons, and they aren't as different as ents and ghouls. And bats, as far as I remember, have always been alive, but if you give them to the Dungeon faction, I think it would be pretty good.