In general, thank you for the map. It would be even better if it were more challenging (but I don't want to replay it). I'm glad there's a story and that it develops.
And I'll ask again: what principle was supposed to be used to find this mountain dweller? Maybe I missed something.
Added 22 minutes ago
By the way, my champion didn't move at all in the arena. So, I defeated him with a relatively weak army (centaurs and trappers). I only attacked him with my hero – he dealt some incredible damage to the champion (my army only held back the summoned troops). I hope that's how it was intended.
Added 26 minutes ago
I found the mountain dweller, but he's not in the Southeast, as described in the text file, and not even in the Northwest, as it says here, but directly north of Kur-Strayk. A story-related clue is really needed – where to look (either hint at the search area or that you need to look for a chapel). And near this problematic mine, it would be ideal, in my opinion, to place a sign like "Dwarf mines – no trespassing" or something similar. It's not good when you have to complete an interesting story map using the author's hints.
Added 28 minutes ago
Another suggestion: it would be nice to somehow reward curiosity in the mines, for example, by placing the Tree of Silvanus near the one-way portal (the mines are no longer relevant at this stage of the game) or adding a small quest so that it would make sense to go there.
Added 1 hour 0 minutes ago
I finished the map. Thank you. I'll be waiting for the sequel.
Regarding the second part of the dungeon: "I would like to add something interesting, but I don't know what." The most interesting thing on the map, without the possibility of hiring a second hero, is the second hero (although on this map, due to the passivity of the blue faction, this is not very relevant). I don't know what is planned for the next mission, but perhaps an additional hero could be included in it as well.