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Yesterday, I completed your map, and here are my observations:
1. Despite the Bishop now having more troops, he is still weak.
2. The Necromancer behaves very strangely: with a mana reserve of 510, he only casts Unholy Word, and only 10-11 times. After that, he simply attacks with his units, and he doesn't care about his large mana reserve.
3. The quests to collect tomes and tears are only counted after the ritual.
However, the map is playable; the cutscenes are well-made, and the design is decent. I wish the author good luck with their future works.
Please provide more details about the Bishop.
Regarding the Necromancer, Gerter has described everything to you.
The quests are completed, so it's all minor issues.
Added after 38 seconds
The Necromancer has a combat script that casts Unholy Word 10 times. The author didn't give him any other spells, so he attacks with his units.
I started playing with the Hero. I'm progressing without any losses on the Golems and Chaos.
Well, good luck with your playthrough.