Move IT to the bench, start Smart, let him be a facilitator, look to get Bradley, Horford, and Crowder more and better shots. Run more plays for certain players and RUN. (Obviously they'll need to defend aggressively)
Bring IT off the bench, let him do his thing, until the opposing teams starts to react to his game. He'll end up playing almost as many minutes as he does now, and still get his 20+.
Many be worth a try.