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

Regarding the skeleton archers – the gas sector is right. Archers won't make much of a difference. Also, why isn't luck/soldier skill available in the upgrade system? I think it's better to choose one – either magic or education. I wouldn't take stone skin in defense either – only darkness rules there, and if you don't use it in time, you're done for; the orcs from Necropolis will crush you, and no stone skin will help. You need to focus on blinding the vampires, blinding magic, and mind control. If possible, get the Necropolis set – you need to reduce Battle Damage by any means necessary. And take tactics instead of general speed. At least that way, the cyclops won't reach you.