Hand of Fate. Part 2: Despair

I've just loaded this map... I want to say right away that the Academy is my favorite Castle, thanks for all the Titans! Magic was really off the charts, exceeding 50; I have 67 at level 33. But I switched from Chaos to Light, and after maximizing my knowledge, I equipped mini-artifacts with +37% initiative, +10 defense, and attack against Titans and Rakshasa; it was pretty good. I defeated all the enemies, especially the one on the island; he had good stats and a lot of Archangels, about 150 of them, who killed my units immediately, but I managed to overcome them. I understand that I need to collect 666 sulfur and the Necromancer set to win. I keep sinking into quicksand; I can't seem to get past it, although I completed the quest with the hounds, but from the poem, I realized that I also need to find the Tear... I understand about the hip of the Great Bear, but to get there, I need to cross the sands, and I can't get through anywhere. I thought that by taking the summoning book after the hero on the island, I could somehow use the Astral Gate to get through, but no, there are no Astral Gates on this map. In general, I couldn't complete it, no matter how hard I tried, but it's a good map; you can immediately feel the professionalism in map design; well done! P.S. By the way, you could probably put more sulfur on the map. I took luck and the skill from it, which gives a certain amount of resources after a battle. Killing the elementals that guarded the passage to the water and the ship gave me 318 wood