Blue crystal

Scout -
Ranger - (if someone watches, the battle will be very long)
Mage -

All three according to the rules and with almost no losses, but I couldn't honestly defeat the flyer. Almost all battles are like this - , just wiping out the entire army before the hero's turn (who has a sharp mind). Once in 10 attempts, I managed to move and summon a subordinate, which the enemy immediately removed. As I see, vasik had both a ring and a staff; with them, it would have been possible to win, otherwise, there are simply no chances. I played on the very first version on Hero difficulty, and it took 165 days.