Heroes of Might & Magic: Olden Era - Обсуждение

Hello everyone. I have a couple of questions about the game. First, has anyone figured out how necromancy works? According to the description, part of the health points goes towards increasing the number of troops in your army. But for some reason, I only see an increase in skeletons, dogs, etc. The number of vampires or death knights doesn't increase. Maybe there's some other parameter involved?
Second, what does WIP mean? I see this inscription on buildings, spells, and artifacts. But I still don't understand what it means.