Nargott
I was wondering if it would make sense to completely remove the Orcs' magic resistance skills.
Instead, create a single, unified skill called Resistance (+10/20/30% to health) based on Education, and add three branches to it: "Weakening" (level 1) and "Corruption" (level 2) for Light, Summoning, and Darkness. There's no need for "Sustain" skills, as they duplicate the functionality of the general "Distraction" skill with chants.
However, this would mean that, in addition to their racial skill, Orcs would only have 8 skills (they also lack Education), 3 with 20%, 3 with 12%, and 2 with 2% chance.
Why did this idea come up? Because of the decision to abandon specific skill bans (I believe this mechanic is flawed because it requires too many levels to be invested in it) and to avoid creating unnecessary complexity with inventing various random effects for the 4 empty skills.