You didn't specify for attacking or defense, and tbh there is zero reason to use Aero if you are running Hyper Beam. He is just bad with it, but he is a decent pokemon for Rock/Steel damage. Many better pokemon with Hyper Beam.
Farfetch'd ranking Leaf Blade higher than Air Cutter? Most things you use Flying on will be resistant to Grass types... Double Flying moves is best imo.