For The Arrival don't play defense, maximize offense time. Since you don't have to win, switch to man-to-man defense and control the player guarding the ball handler. Just move away from the player to get him to shoot as soon as possible.

If you need more time to score points, you can resort to fouling players while on defense to get the ball back.

For The Shootout, after you have done the required number of assists, minimize the Hawks offense time by holding on to the ball as long as you can.