Yuna, because once again FFX made magic usefull, the reasons i gave for the Black Mage apply to the White Mage as well...
abysmaly low power, lucky to do 1/2 the damage the other characters do (BM), spends most of her MP on healing her own HP (WM), run out of MP just barely out of the towns gate just trying to keep up with the other characters in general... MP restoration items are usualy the most expensive or rare items for any kind of restoration...
FFX changed all that and made Mages usefull... Having free MP restoration at every save point saved the Mage Class altogether, along with nerfing the Fiends to where you could only use certain character effectivly on certain fiends...
now all of this assumes normal gameplay, not power leveling every character through at least 3 other characters grids...