Unfortunately this is not possible within the default controls. It is literally a SINGLE key to a SINGLE action. The Control Options don't allow for combination of keys.
Just write your own macro/script to do that and then bind them on keyboard/mouse inputs
my solution was an 18-19 button mouse.
Used to use razer naga, now I'm using logitech g600.
G600 has one more button than naga, it can be a normal key, or mouse shift to make 2x the keys. It makes it so you can assign keys in the middle of nowhere on the keyboard to an easy mouse button.
