Firstly if You haven't yet, check this thread that shows how to map keys onto controller:
Let's get back to our topic.
To be honest it's personal preference.
But here's one example from one of our users.
L3 - Primary Aerial
Circle/B - Secondary Aerial
D-PAD Down - Third Aerial
D-PAD Right - Demo Bot
Square/X - Dribble Bot
R3 - Wave Dash Bot / Orient Bot
OR
(Make sure the config has the default keys.(You can head over to appdata/roaming/wescript/rl and delete the configs and restart the game to get them as default.))