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Although on the Portal, people seem to be playing Necropolis with random heroes. So, I think it's worth at least trying.
Perhaps it would be worth doing such an EXPERIMENT temporarily and observing the games with a blue Necropolis and a random hero....I think the games will speak for themselves....
Moreover...I am ready to play N number of games against a blue Necropolis with a random hero, using any suggested Castle (Castle, Tower, Swamp, Rampart). I don't think Dungeon or Fortress will be a good match....
I play Necropolis quite confidently, but it's sometimes difficult to counter the generator's strong arguments in the starting area, which doesn't allow you to develop much in the first or even the second week with, say, a Vokial....And then, in the secondary phase, a mage or an expert archer with a decent group of archers appears, and you can start losing.:D
P/S: I hope a poll will appear later. I'm not very good at this, but I hope that more advanced people will help!!!!