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

It’s better not to take “Preparedness” with a defensive skill – it’s a waste of skill points. Luck will still be given to one of your heroes (and I hope you’re leveling up at least two). Regarding education, “Wizardry” is still preferable in this case. “Soldier” does affect the chance of blinding, and it also helps the skeletons. Take “Lich” from the “Archmage” faction, as you’ll need to destroy the tent and cart first.