Ideas and suggestions.

And who is weaker at the harbor on the main map? Tower? Inferno? I don't think they're that weak. And the mirror is a completely specific issue that can't be solved by changing the skills of just one hero. Rather, scouting experts should be banned in principle, as should logistics experts and experts in 4th-level magic.

P.S. If you don't understand something right away, it doesn't mean it's nonsense.