Great Battle

The map is indeed interesting, but it's almost impossible to survive defending with certain castles. For some reason, I don't hire more than one hero, as I think it's better to give all the resources to a single hero, but I know that's not right because you can't manage the entire map with just one hero. I managed to develop up to tier 7 units with Mages (thanks to a hero with the Fireball basic ability), and Devils (with the help of the Iron Maiden, or rather, ballistics, which levels up well on max level from the chests), but I couldn't build up further due to the game's random events, but I managed to hold everything back with Dark units. I'll try to progress further on this map.