Dennis Smith Jr.
Tell me if you have heard this story: the Miami Heat is interested in Dennis Smith Jr. Smith is one of the best point-of-attack defenders in the league and Miami still needs to get more athletic.
Smith provides the power and speed that Miami needs. Smith would be Miami's backup point and can pressure opposing ball-handlers at the point of attack, making things easier for the backline of the defense.
Smith would be the ideal guy off the bench to make things ugly on defense.