Quick battle.

The downside of quick battles is the inefficient use of mana and the failure to utilize the special effects of dynasty weapons. Mana is the main problem; several times, a lot of mana was spent in quick battles, and it wasn't enough for a fight with a serious opponent. I decided to replay a quick battle in auto-battle mode to understand where the mana is being spent. I had a large Necropolis army, and the neutral creatures were Berserkers, with a low threat level. The Berserkers couldn't even theoretically reach my troops; they were simply shot down by spiders, liches, and skeletons. But the AI, first of all, cast Mass Drain, which consumed forty units of mana – there was no point in doing that.