Walkthroughs for custom maps.

I've been struggling with the Paragon 2.0 map for several months now, playing a couple of hours in the evenings after work... I didn't expect it to take so long. The map is interesting, but some moments are really annoying, and I regularly have to open the editor to see if I missed anything and what awaits me ahead (so as not to waste time on saves and rollbacks to a situation a couple of weeks earlier).

At the moment, all enemies have been defeated, except for the orange one (the last one). All that remains is to pass by Seroskal and slip into the portal, giving the last Earth book and Boots of Levitation at the entrance. I can easily take the Inferno Castle; I've checked.
But I have a couple of questions that I still can't understand and resolve... Help me if you know. They are really annoying because I can't understand if I made a mistake somewhere or if there is a bug in the map (or something went wrong specifically during my playthrough).
1. The Wizards in the Dungeon behind the tent that Archmage Naerod could have opened if I hadn't killed him. I killed Naerod, and now I can't get there anymore? Many quests are tied to those Wizards: the tent in the upper left corner, behind which are the Titans; the tent near the Elemental Castle after Inferno (next to the prison where Vael will reappear). Is it possible to complete the map without access to those Wizards?
2. The quest for the Alliance of Angels is even more annoying in some places. It's annoying because, as the game progresses, the signs and dialogues constantly hint that I should have already assembled it by this point, but I haven't! I haven't assembled the Alliance because I don't have the Wonderful Armor (the weakest item for the chest). Where can I get this armor? I've searched the entire map, examined each of my heroes under a magnifying glass (maybe I gave it away once because I didn't need it), and checked the artifacts of enemies in the map editor. I just can't find this damn armor!
I assume that the map can be completed without the Alliance, but that's not the answer to the question of how to assemble it. And I also want to get the Archangels on the Grail Plain.

After completing the map, I will be ready to write a full review-report about the map, but for now, I'm stuck on these points and don't understand what I'm doing wrong and whether the map can be completed (without cheats) in my situation.