Which units would you like to replace/add?

Replace them? They are already magnificent. And they look so beautiful with the green color!:D

I played recently, and Furies joined me, but it was just too much of a hassle to turn them into zombies in the dungeon. Zombies are definitely not a necessary unit, best suited for a castle or, at most, in the army of a secondary hero, which is all they are good for.