Let the probability of these abilities be as the developers intended.

You're a bit confused here. If you want to play with that probability, play online. Play alone for your own enjoyment without saving. Play a pseudo-online game, finally. (There is such a type of tournament. I think it's interesting.)
Offline Tournaments differ from the game "as the developers intended" approximately as much as a 100-meter sprint at the Olympics differs from jogging in the park in the evening. Both are, in principle, running. But they are strikingly different. :D
Offline Tournaments are not a game for enjoyment. It's hard work if you want to achieve a really strong result. It's a game where every move, every battle is crucial.
On some maps, when playing the offline campaign, the first day takes me 8-10 hours of real time. Scouting with cheats. Building a plan. Trying to implement it with cheats (in terms of experience, in terms of the turn). The maximum number of actions for the first turn. (building chains, the first battles, often extremely difficult for heroes of the first levels, and so on)

However, I will say that battles with Minotaurs (specifically Minotaurs - a hero with freezing doesn't bother me for some reason), playing with "blind ambushes" - this is, for me, an example of some kind of unsportsmanlike behavior. Something like doping in sports.

Added after 8 minutes

or in the offline campaign, maps are completed in 5-10 days!

I missed that... I'll really disappoint you if I tell you that sometimes it takes MUCH longer? ))