Posts from Where can I change the secondary skills of heroes?
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How should this be understood? Well, everyone needs to share so that there is more diversity. Only then will Modding thrive.
No one answered me. Maybe they don't know, or maybe they don't want to share.
BUT!
I still found a person who suggested where I could find the game's mechanics (and their coefficients). In principle, it was logical that they were there, it's just that it's hard to find them in a pile of everything.
Well, let's thank him.

He suggested where the settings for secondary skills (and tertiary skills) are located.
Skills

And I accidentally came across the limiters for learning these skills in another folder. In the screenshot, they are labeled as "prerequisites".
Their limiters

This is how it looks as a whole:

Feel free to use it, those who didn't know :3
In general, I believe that the most important thing in modding is "friendship" =)
What does this mean? It means that "everyone" should share their work so that there is more variety. Only then will modding thrive.
Actually, what I mentioned above does work. But it doesn't contain everything.
For example, treasury management (the correct name in the game files is Estate) is not specified in DefaultStates, and therefore there are no coefficients for it either. =)
FastAndFurious (speed +1) is also missing there.
Where can I find them... oh well.
In Heroes 5.5, this skill is actually increased as you want. Ask there if your English allows it :)
My English is limited to the point where I can understand some values in xdb files =)
I can only communicate in it using a translator xD
Yes, I looked into the 5.5 topic, but unfortunately, the result is about the same as I already knew from my own experiments.
There are some skills that have stats in DefaultStats. Everything else is in one well-known place (irony). It is unknown how to access them.