Mod requests (orders).

Hello, dear fans of Heroes 5.
We often play long games with friends, level up, and then fight. I know it's strange, but we enjoy it.
I'm interested in a diplomacy mod. I've searched online, but I haven't found anything. I'd like to increase the chance of recruiting units specifically from the castle faction you're playing as. It's really annoying when you focus on diplomacy, and units from evil factions readily join you when you're playing a good faction, and vice versa, while your own units send you away. Perhaps this could be implemented through the Leadership Crown or through the diplomacy perk itself.
Since the games are long, Inferno, Dark Elves, and Magic factions tend to take a backseat. Are there any mods that strengthen these factions in a long game? A good solution in 5.5 is to have the choice of a hero class that gives the hero more attack and damage as they level up. But overall, we didn't like that mod, although it's interesting.
By a long game, I mean level 25+ and a completely cleared map.
Thank you.