Suggestion: Select "Parry" on "B" Button Gamepad

I tried selecting “Parry” on the “B” button on the gamepad but this created a conflict with the option to use “Rune 3”, the “B” button is useless at the moment so it would be interesting for me if it were possible to remap it, so that I can use parry on B and switch mainhand and offhand on RT and LT easily and still using runes normally.

Thank you.