psatkha, if the authors of this mod couldn't achieve balance, then I definitely won't be able to do it.
I doubt that it's even possible for one person to create a fair balance. What one person considers logical and fair, another might consider utter nonsense.
However, the balance issue needs to be addressed, so I suggest we bring this up for general discussion. For example, we could hold a vote on the most imbalanced creatures in this thread. Yes, it won't be quick! Because there are many creatures, but we need to start somewhere!
Wow, did you even click on the link from my previous post?!
P.S. What's with this unhealthy obsession with voting?!

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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1