We don't seek easy paths) and maybe I just feel sorry for the Hydras and take them with me) There was a case where on a map, I managed to develop a Chaos hero with both Death and Nature skills (there were many altars), so I kicked everyone out and left only the Hydras, cast Vampirism and Dragon Strength on them, it was fun!
Aren't you worried that the hero's speed on the map will decrease?