I've seen a few deluxe auras being combined with sets and it looks great somehow like force symbol deluxe aura + black rose set and its working well somehow. Same goes to deluxe Shimmering Sun + black rose set. Still, it depends on what the mass wants but giving as another slot for wearing auras where we'll be able to pick one which will be placed on top and which piece will be placed at the bottom will be fair enough.

If ever this option is added to the game, I also suggest to give us another slot for wearing badges