I've given up on that. You either have plenty of time to clean up everything or you don't and you leave it. But talking about spells - how does spells with a range of touch and LOS interact? If I cast invisibility on a party member can I leave him out of my LOS or the spell will drop if I do? Same with buffs and Physical Mask.
P.S I didn't know you can't clean auras if you cannot Astrally perceive. Another thing that screw up Mystic Adepts. There are close to zero benefits of playing one now. Especially with the split magic between spell/points. I'm seriously considering giving Mystic Adepts the ability to see the Astral for free even if they can't go there.