If you take a second hero, it slows down the development of the city because you have little money. Again, I'm writing about witches; I wrote about the best-case scenario, meaning this is unlikely to happen. And my first post was written at the beginning of the mission, not in the first week. And you definitely won't be able to do it in a week on a closed map because you'll have to go back for upgrades and reinforcements; you can, of course, use hired heroes, but then your scouts won't become agile, and I repeat, a hired hero will slow down the development of the city.
Sorry, but that's nonsense.
The absence of a second hero is what slows down the development of the city. Because you have to have your main hero collect every resource and run to every mine, even though his purpose is only battles.
I constantly play on "Hero" difficulty. And I always take support heroes. And I have enough money for everything. But without them, you have to run to the city for reinforcements and waste precious action points, which slows down development.
That's why you can't take all the mines.
Горящие реки сходили с ума, пытаясь остаться водой,
Земля пропустила коварный удар, раскрывшись на шаге вперёд,
Взлетел разъярённым драконом Огонь и понял, что тоже умрёт...