Discussion about Dungeon (Dark Elves).

I don't think a second hero is needed only in the first week... after that, he will only be useful for gathering resources and supplying troops.

But even that is significant;)
And he can also scout the map, seize mines captured by the enemy, in some cases harass enemy heroes and lure them out of their castle, capture unguarded castles, and also hide in warehouses where the enemy cannot enter:D
That's how important a 2nd hero is!