Necropolis and Demon.

Regarding the topic, it's actually quite difficult for a demon to defeat a Necropolis. Firstly, because of the "meat shield" tactic. Secondly, because darkness doesn't affect Necropolis units, but it works very well against demons. What can I advise demons to do? Well, firstly, switch to light magic. That's one thing. And definitely invest in attack, luck, and leadership; otherwise, it will be even worse. And perhaps it's worth taking a defense skill with readiness.