My strategy in this series is going to be quite simple (maybe difficult to execute though). My perimeter defense is quite extraordinary. Conley and George are two of the better defenders in the game right now. When you add in Ariza's solid defense, those three will make Durant and Williams job as difficult as can be.
Let's also face the facts here, outside of Indiana's two best players, Ray Allen is really the only other player that can be counted on to provide consistent scoring.
My main rotation will consist of my starters, with Ariza seeing heavy minutes, Evans and Gee getting time as well. The rest will only see situational minutes.
Primarily, my rotations should look something like this:
Okafor/Anderson/George/Redick/Conley
Okafor/George/Ariza/Gee/Redick
Evans/Anderson/Ariza/Gee/Conley
Evans/George/Ariza/Redick/Conley
Okafor/Anderson/George/Ariza/Conley
Smith and Bayless will get time if other have foul trouble. Ellington and Green are there mostly just for shooting.