I can sometimes catch an aura sphere when I'm midair and my opponent is approaching me; I start moving in whatever direction is retreating from my opponent so that if I B-reverse and my opponent is moving towards me, it pushes the aura sphere into my opponent as I fall(if I am facing towards them before the B-reverse).
I still have to think about when I should do it, considering the opponent may hit me if they attack earlier than usual and my aura sphere is not that large. Otherwise it's a reasonably safe neutral option; If they avoid it or I miss, I can throw the aura sphere, shield, shield then jump, dodge, cancel the charge and continue moving, or use a jump cancelled aerial or up smash depending on the situation.