It is amazing to me how you can confuse me with such a short sentence.
Well... I think it is not a good idea to try pcf in an F4 nonfeedback amp but I had to ask...
I was not clear?
You can set up a unity gain follower for less than unity gain using an input
voltage divider, and then bootstrap the bottom of that divider to the resistor
which is sensing output current to ground.
This will lower the output impedance of the follower.
Nevertheless, that was a useful and imaginative example.