Use a tip chord that is 70 to 100 % of the root chord to avoid tip stall.
Use a low aspect ratio of 4 or 5 and large ailerons with25 to 35% of the wing chord and at least 50% of the semispan to improve roll rate. Use a large rudder with lots of throw. Use light wing and power loadings.

Hmmm.... sounds like a 3D fun fly configuration. Copy the Ultrasport 1000.