NHF – new heroes for Heroes V 3.1.

Consider it however you want. I once researched the topic of randomness and came to the conclusion that a range of 1-3 and non-random damage of 2 are equivalent, and the same applies to luck. Randomness is more difficult to predict for both you and your opponent – it's a double-edged sword. When your opponent has a unit with +5 luck, it's more dangerous for you than a unit with +50% damage, but the second option was more reliable for both sides.

I'll repeat: the game isn't just about the final battle. In the skirmish, you fight against the AI. It knows where to strike. And the player doesn't, so they "panic." During the upgrade process, all protein-based units have a fear factor.

3 levels is 3 perks. A special ability is 1 special ability. When other heroes have a special ability equal to 1-2 perks, and one has a special ability equal to 3 perks, what do you call that?

I'll repeat: the game isn't just about the final battle. This is not a dueling mode. Other heroes have their own special ability + simply more archers and/or powerful spells. Luck, unlike even the attack stat, doesn't use its full potential. If it could predict, it would use it to the fullest... And only then would we have a pure 30%.
+3 to luck is not much. Unlike skills, a special ability won't open the way to perks. Play with this hero, everything will become much clearer; it's pointless to prove it. It's very easy to write a special ability.

Added 6 minutes ago

S
Both have a strong special ability; in the first case, it's due to an additional bonus to health for an already strong unit (warriors), and in the second, it's due to a bonus for overpowered units. This special ability is what brings Nibros to the level of these overpowered "fathers." But what about modest middle-of-the-road units, such as those with a special ability on peasants, archers, swordsmen, griffins, zombies, etc.?

You're not comparing them to heroes with reworked special abilities. It will be like in TE (I'll borrow it, I confess, but this was hinted at during testing, and the idea was liked). And I'll repeat: I'm not breaking the boundaries set by the game. That is, the game won't become more imbalanced. Where am I breaking the balance? The hero isn't strong (he's actually a little above the level of those you named and below those I named, although it's still not entirely clear who is better). Play it, and you'll see everything for yourself.

Added 50 seconds ago
I'm finishing up now; you're just distracting me from the mod. I need to create heroes, not waste time with nonsense...