Sinaksota

So I know I have to use a key remapper and I've done that successfully just fine.My question is specifically for the battle UI. As we can see in this, this person (around the 3 minute mark) uses the controller to navigate the battle UI ***WITHOUT*** mapping a joystick to the mouse cursor. I can map my joystick to mouse cursor but it's quite cumbersome, I don't like it but I still want to play PRO specifically with my controller. Can anyone explain how this person does it?