If White Mage were to receive just 1~5% more "Converts % of 'Cure' amount to MP" effect some some new source, the job would have a HUGE lead in cure MP efficiency when properly equipped. Maybe I'm nuts, but I assume the effect will be on another piece of equipment or a level 99 merit.

Something along those lines would pretty well blot out the main reason Scholar or Red Mage could overtake White Mage for marathon events, and maybe the jobs could finally get some new and much needed tools for keeping folks less dead.