Duty action should be R2 + R3 + L3

Or...

should be player assignable.

Like for me I would assign it to L2 + L3, as L3 currently does nothing for me. (Its not assigned to anything.) I use R3 for lock on specifically because using L3 for lock on causes some serious headaches. (As this is the button you move with and could lead to your death if you accidentally lock on at the wrong time.)