LeBron can't be defending Durant the rest of the series if they want to get back to this.
Game 3, they have to bring Tristan Thompson to the bench, and start Kyle Korver, and put LeBron at the 4. He conserves energy by then, it opens up the floor more and gives them more weapons offensively.
Sure, JR Smith or Korver will stop KD, but if LeBron can't, does it really matter? Battle fire with fire at this point.