My idea would be for Character info sheet in game, I would make it where it was like a Flip book and each one is a different job. Example would be something like this.



Arrow's on picture if you hit, would be a different job each time but have them save the armor on each slide to save on space instead of putting armor back into inventory.

So each character you change to on the flip book you can swap in and out armor from inventory.

So one would be paladin has paladin armor saved, hit arrow changes the character sheet to Next Job you have saved say black mage with its gear on the sheet if you want to change job the sheet flips to black mage but armor stays on paladin.