I would probably choose Skeletons, Vampires, and Liches. There are many Skeletons, and with Blood Brothers + amulet, they hit VERY hard even now. Vampires attack without retaliation and drain a lot of health (they drain life – don't think of anything else :)), they are a very annoying opponent. Liches are good archers and casters; it's best to kill them early.
I agree with you about Vampires and Liches, but not about Skeletons. Although there are many of them and they hit hard, they are not very fast. Their attacks can be avoided by keeping your distance. I would put a curse on someone more serious, but not on Zombies. Zombies are just too slow. :smile24: