Ideas and suggestions.

I suggest fixing the resistance set from 50% to 35%, because combined with the hero's resistance, it becomes an unreal imbalance that almost certainly guarantees victory in a match.

Absolutely not. Artifacts that grant resistance should only be – strengthened! Because ideally, the ratio of Might and Magic should be 50/50. Currently, in Heroes, Magic has a very large advantage over Might. Therefore, the Resist skill itself can be changed to make it stronger, and artifacts that grant Resist can be enhanced.