anti-Necropolis faction

I don't know, I don't know... It depends on who you're playing against.
Generally, Orcs aren't very good against Necropolis. I played as Necropolis, I had 2 towns (1 Elven), and my opponent, who is better than me, chose Orcs. He also had 2 towns (both Orcish), and I easily defeated him! Although he had researched "Darkness Shield," it didn't help him. I used the "Mind Control" spell (Puppet Master, I don't know the correct translation, my translation is poor :) ) and "Summon Phoenix!" Although he had a larger army. So, it all depends on how each player plays.