With experience, the idea is bad. I even forgot to mention why it should be limited to level 30, when everything around is stronger. And summoning creatures, in my opinion, breaks the game (in terms of bugs). Wouldn't it be better to abandon such features for both the demon and the player (what's the point of them, they only cause problems)?
By the way, I removed the demon summoning script in the battle with Chaos, but I added Machine Control to him - Ballista - Rapid Fire - and also fire arrows.
By the way, the Mage and Demon were, in my opinion, much easier than the Guardian of the Weave.