Mod requests (orders).

Hello everyone, I want to create a mod that adds upgrades for elementals and phoenixes to the game. All of them were implemented in the EWA mod and used in the mod that changes the Academy Castle to the Conflux. I don't like EWA itself, but the elementals with upgrades turned out really great. In general, I tried to do it myself by extracting the necessary files from EWA and putting them together, but it doesn't work. When a hero with a regular elemental approaches the fort on the hill to upgrade it, the game crashes to the desktop. In general, I'm not much of a modder; at most, I can edit hero skills or creature abilities.

Maybe someone can help?