RTF is a global modification that replaces all towns in the game.

if a creature is upgraded, I don't pay attention to the stat increase, although there is an upgrade parameter, but with it, the increase starts to fluctuate wildly, and for the alternative and basic upgrade, I just try to calculate them with minimal differences in strength.

Maybe it would make sense to calculate the stats of upgraded creatures first, and then the regular ones?

Added 2 minutes later
[email protected], it would be good if you changed the city upgrade and unit balance based on the first, second, and elite tiers (for example, for the Dark Gnomes).
I also wrote about the upgrade in my message about this system. I understand that the best solution would be to use the first option?