The Hero's Path

Dear Jack, you've created an amazing map, and what's more, a campaign that's practically a new game in the series. I really enjoyed everything, the quest design, the atmosphere of the world – it's all simply magnificent. And now, about the downsides: 1) Some units are impossible to attack; the game crashes immediately. In this case, Rune Magic of Darkness, specifically the Degeneration spell, helped me. When I reduced the level of the creatures, the crashes stopped. 2) I didn't understand what I was supposed to do in the "Incident on the River" quest given by the Khan. Elementals appear, I kill them, they reappear. I tried waiting for them to disappear and searching around, but I clearly don't understand what I'm supposed to do. And finally, the third and most inconvenient issue – whether it's a bug or something else, I don't know. In the "Path of the Necromancer" quest (here comes a five-minute SPOILER), there are portals and creatures in the pyramid. You need to reach all of them through the teleporters and touch them in a specific order, or so I understood. When you touch a creature, its number should appear above it. The number doesn't appear. By reading the hints, I figured out the following order of creatures: 1) Phoenix, 2) Devil, 3) Angel, 4) Djinn, 5) Lava Dragon, 6) Cyclops, 7) Titan. But when I reach all of them within one day (using potions and other means), nothing happens. What should I do? I'm using the standard Heroes version, and the only mod I have installed is one that changes the number of creatures displayed in the tooltip, the color of damage dealt during attacks, and the skill wheel. I'm really looking forward to your answer because I would be very disappointed not to be able to complete this magnificent map.