[Endoperez]

Yes, it does.

Consider spells like Soul Slay, Charm, etc. Save or die - or worse! These are the main counter to supercombatants. Mass enough mages, and one will eventually get through. Due to how the Dominions system works, going a little bit higher will make the chance of success a lot better in some cases, and not noticiably better in others, but it never hurts.