NHF – new heroes for Heroes V 3.1.

Hello everyone. Sorry for the long absence... years, to be exact... and for asking a question that might be a bit off-topic. I simply didn't have the time. Now I've decided to revisit the game; I used to only play through the campaigns and some scenarios. I never played on regular maps. What a disappointment... The AI didn't give me any trouble, even on the hardest "Hero" difficulty level. I even set up scenarios with only one race and blocked some slots to give the AI more castles. Nothing...((( This wasn't the case in the third game. Can anyone recommend something to improve the AI? I've been browsing the forums, but I didn't really understand anything. Some mods are for version 3.0, and another one only prevents the AI from fleeing battles. I understand that you can't turn a computer into a human, but playing multiplayer with real people for hours isn't an option either. Of course, it needs to be compatible with version 3.1 and NHF.