Anything that kills lift toward the outbound section of the wing first is always a bad idea. Inbound flaps are designed to both slow the plane, create additional lift at slower speeds, as well as create a condition where the wing will stall from the inside out. You can probably get away with it on the big stick, because they are so stable anyway. If I were going to do it, I would use flaperons and drop the ailerons, but only by about 1/2 of the total throw, so you at least have that much left for roll control. I would not use spoilers without combining them with some inbound flaps (as in a crow setup).
However, that being said, there is no way you will get by with it on the edge. If you drop both ailerons on the edge, you are going to tip stall that plane in a heartbeat.