Helegmod - A global mod.

And in this mod, in your opinion, which faction surpasses the others?

First, I would like to point out what I believe is the main problem with all user-made fixes. They either borrow abilities from previous installments of the Heroes series or simply buff creatures that they consider weak, without considering the overall game balance.
To put it briefly, each faction has its own strengths and weaknesses. For example, let's take the Academy of Magic, specifically the second-tier creatures - gargoyles. The function of these creatures is to absorb as much damage as possible. They were originally conceived as "tank creatures," at least in Heroes 5. Why? Because this faction has first-tier creatures that can shoot, which makes them very strong from the beginning. But the weakness of almost all ranged units is that, before they can reach them, they become easy targets. And that's where gargoyles come in.

Gargoyles have become mechanical creatures rather than elementals; their damage has been increased by 1-2 for stone gargoyles, 2-4 for obsidian and elemental gargoyles.

Buffing their attack, and doing so significantly, immediately disrupts the balance. As a result, from the start of the game, the hero has an army of strong first and second-tier creatures, which can be easily strengthened (by hiring another hero and building the corresponding buildings with creatures; moreover, the building for improved gargoyles only requires gold, which is very important).
In my opinion, the Academy already has one of the strongest starts among all factions, due to the large number of strong first-tier creatures.
And this is just one observation out of many possible ones. I'm not saying that the game is currently balanced; it needs rebalancing, but this needs to be approached very seriously if you want to create something truly great.
Overall, it's a good job; I like patches that buff spellcaster creatures. They suffer from imbalance more than anyone else in the game. I don't think I need to give an example; everyone already understands what I'm talking about.
I'm currently looking for a mod that would only affect all spellcasters in the game, or at least mostly affect them. But this mod has too many unnecessary fixes, in my opinion.