croco

Duncan still has the biggest defensive impact out of those three, no matter how well Kobe and Lebron play on that end they can never have the impact of Duncan, once again on defense that is. Offensively Duncan is still one of the best players in the league, not on Kobe's or Lebron's level, but the Spurs if want to they still can run every single play through Duncan, this will lead to more points for him without being less effective.

This is also why the Spurs are contenders every year, Duncan could take 30 shots a game and would probably still shoot 50 percent, but Ginobili and Parker need touches as well. I think once the Spurs obivously start to decline they will go to Duncan more often which leads to a higher efficiency on offense, he could still carry the load.