“Heroes of Might and Magic V: Tribes of the East”

I don't use the auto-battle feature; I only play on the highest difficulty level. It only works if you stop them and recruit 900 Cyclops from the second fighter; otherwise, it's impossible. But after that, battles become unnecessary; you emerge on the surface and go to destroy the main castle. Thanks for the safe spot, but I've already played through this map, slowing down the enemy fighters at the castles. I'm just very interested in how it's possible to overcome this castle with the initial forces provided.