Most of the pick n roll that we have used to watch are with the screener (usually) cutting inside the paint, and the other big man outside the 3-point line, so we had 4 players standing outside the 3 point line and one inside. But as you'll watch from the video, it's very effective as well the option with the other big man standing at the middle post asking for the ball, so with 3 outside players and 2 inside. Very crusial for these kind of pick n rolls is the player with the ball to know and read the defense and be very good passer.