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It's not about the heroes, but about the spell itself. Skeletons last for 6 turns, and then Twix lasts for 3 turns.
Everything is clear with my idea, but I still think it's a good solution, especially if you have enough archers: 6 turns to harass the enemy from a distance, and then finish them off with everything else you have available. ;)
By the way, here's another question: can you apply buffs to units standing under a Sanctuary?
Думающий поймет. Действующий совершит. Дорогу осилит идущий ©