-For The Arrival, don't play defense. Instead, maximize offense time. Since you don't have to win, switch to man-to-man defense and control the player guarding the ball handler. Simply move away from the player to get him to shoot as soon as possible.
-If you need more time to score points, try fouling players while on defense to get the ball back.
-For The Shootout, after completing the required number of assists, minimize the Hawks offense time by holding on to the ball as long as you can.