Which units would you like to replace/add?

In Necropolis, the strongest unit should definitely be the Dragon; it just needs to be buffed and its growth rate reduced. That's all!
Regarding the ghost effect, it's a good idea. You could also add a Vampire Touch or a retaliatory strike; there are many other things that could be added.
In short, it's not worth changing the 7th-level unit:smile38: