Pao Archipelago

The hero already had a decent army, but it was weaker than the joined forces. Moreover, undead creatures are constantly joining. Oh well, never mind. The map is difficult until a certain point, until the hero's army becomes stronger than the neutral forces. So far, I've only completed the dungeon and emerged outside. And regarding resources, there's a complete shortage of mercury. I haven't been able to find a mine... Maybe I didn't look hard enough. And I could also use a mentor. Otherwise, the AI has given me unsuitably native lands and the "Death's Advance" skill. But that's not what I need. I would have preferred scouting with navigation. In any case, the map is captivating.

Added 1 minute ago
Yes, I was playing on the impossible difficulty level.