ASW – Alternative hero leveling.

1) A very rare map must appear;

4) This city must be captured before the third week, and already with a built guild, that is, even earlier;

Excuse me, but capturing new cities in the 3rd week and later means that it is no longer an open map, but a closed one. That is, on an open map, this is not a problem.

2) That second city, which will have the necessary rare magic, must appear;

On an open map, this is not a problem (there are many cities). An open map implies spreading out and capturing cities in the 1st-2nd weeks. Play the third game on its Grand Strategy Campaign, and then you will understand what kind of maps I am talking about.

5) The main character will return to the second city and take this magic;

How is this different from "returning to the starting or home city"?

Added 2 minutes ago

And even if this coincides, will it be worse?

It will be worse than your classes only if the balance suffers.

Well, it's a city class with summoning. What's the difference?

Well, you made an elf (with an upgrade!) with summoning. Now he has 3 native schools. Will you make the other heroes with 3 schools as well?
And if you don't give the elf easy summoning, then there will be little point in the summoning city.