Comet/Meteor

[Alkar]

In previous .dat mines it was found that SCH is set to receive a light elemental nuke between 90 and 95 (don't remember the exact level). Considering SCH gets absolutely none of the light-based "nukes" in this game and the nature of Ultima in the series it only makes sense unless the new "Comet" is changed to deal light damage. Of course this can change as these spells and levels are not set in stone and can be modified in other VU (and probably already were in a way).
If you want a lore reason for SCH getting the most powerful spell (in your opinion anyway, Meteor is often considered more powerful especially in FF3,4,7) it's simply that Scholars study magic and learn to use them at their full potential.
SCH can cast spells more efficiently than WHM or BLM but their shortcoming comes with stratagem charges and lack of most spells in both white and black magic.
Do you really think a 2hr spell is going to make BLMs cry? I don't remember any BLM complaining when SMN got Odin.