Development of a Necropolis mage hero

Perhaps not everyone is interested in developing a Necromancer, and there are other topics to discuss? I'll try to develop Anastasia in the campaign in this way. I'm not sure, but I think that in a duel, where losses are inevitable, "Sacrifice" will be more useful. In the "Sign of the Necromancer" campaign, with a 20% bonus to attack spells, it looks better, considering the small number of troops at the beginning of the missions and the powerful magical strength of the campaign heroes. By the way, it's also interesting that when I played against a Necromancer who used "Sacrifice," I didn't deal any damage to his troops - for some reason, the 67% damage didn't transfer to the sacrificing unit, and the attacks simply disappeared. All that remained was to attack the sacrificing unit itself and shoot.