"HW rulez" mod (add-on) for HoMM3.

Exactly.

Actually, I would remove half of the restrictions from the rules. Vicc, as far as I remember, quite accurately described the real overpowered strategies in the game; if I'm not mistaken, these included Necropolis builds, Diplomacy, 4 damage dealers, and stealing control from units under the effect of Slow, as well as hit-and-run tactics. Everything else doesn't have such a big impact on the game and could easily be allowed. For example, Mullich and level 4 specialists were unbanned; did anyone suffer because of it? No one did; it just means there are fewer rules to remember. Are they better than Gunnar, Kirr, or Crag? That's a rhetorical question.
In my opinion, it would be possible to allow Fae, Mages, and Vampires. And Isru and Vidomina, but only prohibit them from being chosen as starting heroes, like Gosh. At least they finally removed the Red Rush strategy. Also, remove Cartographers and Forts from the map. And allow the Grail, in all castles.
And all these 2-level buildings and 3 starting units are just catering to the small weaknesses of players who want a relaxed game, where everything goes smoothly and the game is under complete control. This is the same as the absence of morale, gold sink, experience for troops, overpowered scouting, replacing scrolls with gold, etc., in Warlords. And as a result, you get those very "knife-throwers" that were mentioned above, who need the sun to shine at the right angle, the knife to have the correct weight, and the wind to blow only in their favor, in order to hit their target. And if this player, who is used to this castrated environment, suddenly finds himself in a normal one, then panic and swearing immediately begin, saying that everything is the fault of the damn SOD, who placed obelisks near the castle, now I will lose 5 more marks and will not be able to take that max-cons with a level 121 hero, as I was used to. And if the morale of a stack of Gremlins is also low, then the chair will burn out in an instant.
I'm exaggerating here, of course, but I hope the point is clear. I wouldn't want young generations of players to repeat the mistakes that former top players made.