Assuming you have access to a keyboard as well, F1-8 can be used to quickly target a specific party member.
L1+R3 switches the controller to a virtual mouse and back, with L2/R2 functioning as left and right mouse buttons. Depending on how quickly you can do this it may help as well.
The PS4 controller's touch pad also functions as a mouse, though far less precisely than the virtual mouse mode; Drag to move the cursor, tap to click, hold a double tap to hold the button. That last command in particular is especially touchy about working right, but this method may also help