Being able to add a 'glow layer' would be amazing, even moving glowing items glow, to this position could allow the wearing of non-glowing, without multiple parts.
Ex:
( Chest )
< Base Shape >
< Color Layer >
< Glow Layer >
Hmm not sure how coloring the glow would work though could be a 3rd selector? Most glow layers would have to be a little conservatives as not to detract from Aura's. They'll glow in the dark, but not be bright shiny like Aura's or powers. The idea would be to allow better, natural active/feel to an outfit, instead of counting on Aura's, especially tech. Could even make them increase in intensity a little, when in combat.