NHF – new heroes for Heroes V 3.1.

So, here are my ideas:
1) Revive the third game on the engine of the fifth (from a technical point of view, it won't be difficult to create monsters, maps, and stats with mathematics, but castles are more difficult. It may be necessary to slightly patch the original game's executable, but this will require some serious modifications).
2) Have you ever watched the movie "Fantagiro - Cave of the Golden Rose," parts 3 and 4? No? Watch it - it's an awesome movie with great characters!)))
So, I suggest creating campaign maps based on the plot of this movie, but with author's edits and some small fan jokes).
The heroes would be: Tarabas (the ultimate mage, evil, etc.), Xelesia (his mother, an evil sorceress, lol), Darken (his father, an all-powerful MAGE-demon in a human body ((in the movie, he's a demon, but in a human body, and he's a mage-human in reality)).
Here are some special abilities (SA) I came up with for the heroes:
Tarabas: for each level, +2 to knowledge and magic, SA - Lord of Evil + Arcane Mastery - all "evil" races join him. (an example of this is Markel, only with undead, and here, all evil races), and development along a mixed Warlock and Mage skill tree.
Xelesia: for each level, +2 to knowledge and +1 to defense, SA (Mystic), development as a Mage.
Darken: for each level, magic and knowledge +2, SA (the same as Tarabas, but it will be Arcane Mastery and summoning 3 Archdemons on the battlefield (like Arantir's avatar with stats, but with demons...), and the skill - for every 2 levels of the hero, the attack and defense of Demons, Archdemons, and Demon Lords increase by +2).
Even if we can't create the maps, help me create at least the heroes (if they are too overpowered, I will keep them for myself, and we will create balanced ones for the rest).
What do you think? What are your ideas?