This is a really interesting article by Neil Paine at Basketball Reference. The premise is based on skill curves. The idea is that each player has a Usage Rate where he will provide maximum offensive efficiency. For example LeBron James can be very efficient using 30% of his team's possessions, whereas Mike Dunleavy wouldn't be nearly as efficient if forced to use that many possessions. Paine crunched the numbers to find the NBA lineups where each player is closest to the Usage Rate where they produce maximum efficiency. The Pacers lineup of Collison, Dunleavy, Granger, McRoberts and Hibbert came out as number one. For the sake of clarity this doesn't mean they are the most efficient offensive lineup in the league. It means this lineup distributes possessions in the most optimal way so that each player is as efficient as possible. If you don't understand my explanation, please read Paine's, it's much more succinct.