Um...undead monsters? I have a WHM friend who deals 800 dmg Holy (which is really good since its basically insta-cast), also if you want to reach it further, it was one of the most powerful spells in FFX (and since Yuna was the easiest to get the dmg break she is usually your first character to deal 10k+ dmg on ALL monster types).
You answer your own question in your question: "focuses on maximizing white and black magic" However you mistype it, SCH's definition should be: Advanced Job that focuses on maximizing white OR black magic, unless of course the Scholar is under the influence of Tabla Rasa wherein both White and Black Magic are optimized to their fullest potentials. Read carefully your own posts, you claim Ultima is the best damage dealing spell in the game? Scholar by definition unlocks the FULL power of these magics, and since Ultima has in the past (this is a non arguable fact) been both White AND Black magic it makes complete since to allow SCH to cast it when they are optimizing BOTH White and Black Magics.
Oh and I'm sure now that you are grasping for straws since you are resorting to unclever and rudimentary quips targeted directly at someone (that person being me at this point). It really shows you lack of knowledge on the matter.
PS: Dia, Banish, Holy, Rela Crystal, Sap, Swap, Ultima, Aero (FF3), Tornado (FF3) all these spells did caused some kind of damage upon a target, some more than others but damage none the less. So I believe that makes more than 2 spells.