Comtrollers are actually easy as all hell
I set it up so i only swap between bars 1 and 2 with a click. That is apready 48 skills
I then go w or another trick where you can have a bar setup to appear when you hold l2 and r2 or vice versa..i tie my upper bars to my third bar(pet for smn) and bam all skills(ok pre role skill rework) ready to go with spare spaces(another 24) soo yeah not bad at all since i just double tap for the w bar stuff.
It may be even better the mouse and keyboard actually