Outcast's Path

I started playing a map – hero difficulty, enhanced mode. So far, I can say that the labyrinth is very easy. The vast majority of battles are won with zero losses and often using auto-combat. The most challenging units are something like 700 Spectres or 140 Undead. But with a hero of level 20+ + 140 Furies + 50 Lizards, etc., they are easy to defeat. Mostly, you encounter 100 Spectres, 200 Spectres, 300 Minotaurs, 150 Vampires, etc. The second thing that didn't quite work for me is all the upgrades for magic power and knowledge. There are only a couple of Towers and one Arena for the main stats. Also, when resetting to level 10, all the main skills remain, and for some reason, Chaos is given – but what is it needed for? Similarly, in the spell towers, all sorts of useless spells are given; the only useful one is Fireball, which reduces defense for a turn (but is it worth an entire Chaos branch?). Yes, the Mentor can pump it up into Darkness, but what's the point without spells? If you take Defense, then it's not clear why such stats are needed in Knowledge and Magic Power. Chaos only works with small armies, but not with Darkness and Legions on the surface.