I was just testing out ideas for shooting faster, and I ended up using ds4windows to bind Up and Down on the right analog stick to the controller's shoot button and Left and Right to X on the keyboard. Basically let's you shoot as fast as you can move the stick in a circle instead of pushing two different buttons.

Remapping is pretty standard and easy to do with most controllers but this speeds up the first couple bosses a lot and nobody else is doing it so I wanted to ask for some input on whether it should be allowed or not.