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PLD needs the Refresh for spamming of Flash, Enlight1-2, Holy2 MB, and Cure IV. DRK if played right can technically self chain and MB, not to mention a ton of Absorb type spells, so kind of need it....

Because BLU simply just doesn't need it. They also have Magic Hammer and can also main hand a club which has a MP replenishing WS. Also the jobs that do get the refresh actually need it. I'm a 99 BLU...