5 players and 3 balls.

Another passing drill, players 4,3 and 2 hit or toss the ball to 5 who, plays defense in the backcourt.
Player 5 passes the ball to the target and moves to the next position to pass the next ball.
Players 2, 3, and 4 may move closer to the attack line if more space is needed.
Have the remainder of the team shag so 2, 3, and 4 always have balls.

Rotate players after 60 seconds or completing X number of good passes.

Variation: After passing proficiency is displayed, make your setter the target and allow the tosser to turn around and hit.

After passing the ball from two, player 5 goes in the other direction.