Actually, I discovered that the "primary" bar KEEPS the 1,2,3,4,5,6 etc. keybinds, so I just rotate the bars to keep said keybinds and put the buttons in roughly equivalent positions.
One current concern is that I do seem to get a lot of 30-38 dungeons in my duty roulette. Pretty much sidelines B3. For AOE I can use Freeze, BUT I thought to use B2 to regain MP... BUT I may be crazy, but it seems to NOT hit my MP bar much at all. It's odd because the graphic effect seems to center around me rather than mobs at range I have targeted. MIght it not be better to ditch B2 entirely and put a Manafont in there (I style my bars with a series of ST, space then a series of AOE).
I tell ya, it WAS nice to finally hit a 45 FATE (did it because I could use my whole current toolkit) where I had all my tools avaiable!