I do something similar to what Itchyness does in his post (sorry tried to quote it but the old stupid character limit restrictions). I also have a set up for running dungeons and another set up for questing. As a White Mage a lot of abilities you don't need when questing, the only heal I have on that bar is cure 2 it's all you need. On the "running dungeons bar" I don't have any attack spells, you don't need them accept for Repose to stun if need be to get away. So some of the abilities you can scale down to streamline it a bit without gimping yourself.