I always play with the hero I chose at the beginning. I buy another one, usually they become a scout) they gather resources, etc., but the main army is always with the main hero! After that, I can buy more heroes, either for each castle or for scouting other areas... The heroes stationed in the castle level up by defending against computer attacks; I give them combat, wisdom, and other skills, while scouts get movement, economy, and other skills... and depending on their specialty (usually)),
although any of my heroes can become anything, regardless of their specialties and skills))) sometimes even unexpectedly for me))))