The Necromancer's Path.

New oddities: in the quest where you need to find a key (I bought it from Patchwork), the animation for destroying the stone is very strange: can a Stone Golem cast Fireball or Meteor Shower?
Also, I can't complete the quest for Advanced Necromancy. All the heroes except Kaspar are dead, and Giovanni only has one left. How do I complete the quest?
Also, it's a bit unclear why a stack of 45 undead guards a Lich, because by the time they break through, the quest loses its meaning...

Added 1 hour 36 minutes ago
In general, I didn't even win the battle against Bertrand - after all of Giovanni's attacks and the battle with Vessel, he has almost no troops left.
Here are some suggestions:
Slightly weaken Giovanni. At least reduce his knowledge or increase the number of vampires that separate him from us.
Remove the cartographer.
It was annoying that a log and a stone prevented Arantir, one of the most powerful necromancers in all of Ashan, from reaching Giovanni's city...
Weaken Bertrand and prevent him from giving away troops. I'm sure that in the situation of a player with the nickname nikoivanovo, the human and orcish Castles were captured, and after the battle with Vessel, Bertrand simply captured the former human Castle and gave the 3 stacks to either the Orc or Benedict.
Remove those extra Phoenixes.
The Skull of Corruption costs 6k gold. That's a bit low...
Question from me: what are the fat bureaucrats for?

I won't write my opinion about the map, as I completed it on Recruit difficulty. I hope to complete it on Hero difficulty in the next version.
Thank you for the map.

1) There's an issue with the stone... any effect is applied to it incorrectly... why specifically a Stone Golem? Well, because all the triggers on the map have this effect.
2) The quest description clearly states what is needed. Arantir and two other of YOUR heroes must have Advanced Necromancy. Only one left? Then you won't be able to complete the quest.
3) Yes, I noticed that too. It's too harsh for such a minor thing. I'll fix it.
4) See above regarding troops.
5) If you set the number of vampires to 500 (as it was in the alpha version), he won't break through them at all, or he'll break through towards the end of the game. You can reduce the spellcasting. More precisely, I'll block the skill from which most of the spellcasting comes. Knowledge will also decrease slightly.
6) The cartographer is very useful... I personally found him helpful. There are two reasons: to monitor the Orc city, because if the blue player passes through the pass unnoticed, he can easily outsmart the player with his logistics. The second is to monitor Giovanni when he is blocked. Because if the player misses a working portal again, Giovanni will jump out of the portal under the fog of war. And this could cost you the game. As for the added mountains... it's because there isn't a suitable size for this map... so it features empty spaces filled with random things.
7) Game conventions :D
8) I assure you: Bertrand is well-balanced. And if you buy the Staff of Sar-Iss, it will be even easier. With one subordinate stack, you can defeat his entire army with a single attack. In the beta version, he had fewer stacks (see nikoivanovo's replay), and, as Remix proved, he wasn't even a simple opponent, let alone a boss, and was easier than Giovanni. And besides, if Bertrand gives away his strongest units, what's the problem? Without archers, champions, and seraphs, he is weak, although the tactics remain the same as against a full army. Against him, 14 ghosts with Battle Protection will suffice.
9) I was surprised when I saw them. I'll remove them, of course.
10) What's the point of selling +7 to spellcasting? There isn't a better hat on the map, and you can get the Skull at the beginning.
11) Unique unit. It's a tradition to add some unique unit to the map, explaining it in the plot. There was one in "Payment for Love" too, but it appeared less often.