NHF – new heroes for Heroes V 3.1.

Compare that to how many Tier 1 creatures, similar to skeletons, you have by the end of such a game. And compare it to the specialization on a unit at that level (for example, at level 20, bonuses of +10/10 are equivalent to +40% to the number). Because simply having 200 skeletons is a number that doesn't mean anything on its own.

It does. This turns out to be a rather noticeable increase throughout the game, and you can feel it.
You can also clarify it, of course. But we won't always be able to raise skeletons with necromancy. I end up with about 300 in total. Another player will have a different number. But for me, it turns out to be an increase of over 66% =)

I want to do it this way: 2% and 2% with every fifth level.