What skills should Necromancers take when facing Orcs on a very large map?

And what’s wrong with having to fight a larger army? Orcs have rage! They’ll just channel more rage against your larger army! It’s a well-known fact that an orc in late game is a killing machine, and it’s not about the size of the army, and the Necropolis won’t have much of a larger army anyway.

The Necromancer can only put up a fight if they level up logistics, machines, and dark magic... otherwise, there’s nothing they can do... There’s no need to go for ultimate skills and take unnecessary leadership!

I mainly play as Dungeon, Sylvan, and Orc.