CBS defense is really quite brilliant. NBA teams are filled with 3/D players, which means many of those players cannot create for themselves at a high level.
No double teams. Allow their best one-on-one scorers to try to score against our best one-on-one defenders, but do not allow their offense to move the ball around. Close out effectively against the shooters, do not allow straight line drives, and force them to create for themselves or drop it off to their best offensive player for another one-on-one possession.
Offenses are potent today not because of individual one-on-one scoring, but because of how explosive teams can be when they move the ball . Let their best players get 60 combined. Their offense will cap out around 100 while the Cs move the ball on the other end and score 115.