Light or Dark magic.

I tend to favor Darkness (not against Necromancy, of course), especially after the introduction of Vampirism (who said you can’t resurrect with Darkness? You can! And it’s even more effective than with Light, as the HP doesn’t decrease). The Darkness/Fallen Knight combination with Leadership/Empathy works excellently. And against Orcs, the Darkness + Light combination works well. :) Yes, I know what you’re going to say now – “Two spells for a Knight who isn’t a mage by nature!” :) That’s true, but the case with Orcs is special. The thing is, the Orc will most likely silence one of the spells (I recently had a rather interesting discussion on this topic in the “Orc’s Silence Skills” section). He rarely silences two spells, and in addition, the “Twilight” perk becomes available, increasing SP by 3 (for Light and Darkness). Darkness, considering the “Fallen Knight,” increases by 8! In my opinion, that’s not bad.