Board Thread:Off Topic/@comment-26397825-20160419024928/@comment-25396609-20160419193152

Technically speaking we do recover stamina by resting for a short term, or even just by reducing our physical activity to a minimum for awhile. I think it's safe to assume aura regeneration is constant, but can be recharged more effectively by removing the strain on it.

Also if it can be toggled once unlocked, turning it off entirely would likely allow it to regenrate faster.