On all jobs but SCH, I have managed to get the important battle skills one two crossbars - one main, one expanded. Things like teleport and chocobo go on a dedicated non-combat bar, and I have the limit break bound to kb numpad (as I always have it nearby to chat - I could possibly fit it on the crossbar). Things like stances, which are not used often, go to a third bar. I've built the muscle memory to switch bars as needed.