Patty Mills is having a stronger year than starter Tony Parker but his shooter’s mentality keeps him coming off the bench. Parker has slowed down a lot but he still provides the team with vital penetration, particularly at the beginning of games. Mills rarely attacks the paint off the dribble so it's harder for him to get other players involved. A Lot of Spurs’ shooters still rely on the “penetration-dish” concept to provide them with open looks at the hoop.
2) Shooting off Bench:
The Spurs on paper have a significant drop in shooting talent when they go to the bench, so having Mills coming in with that second unit gives them a significant threat that keeps the defense honest. The starting line-up already has a couple strong three point shooters in Kawhi and Danny Green, not much need for a third. The Spurs rely on their bench heavily to give starters extra time to rest and Mills has become the focal point of this strategy.
1) Point Guard IQ/Managing:
Despite Parker’s decrease in speed and offensive output he still manages to run the team smoother overall. He has the championship knowledge and poise to be effective in crunch time situations, getting the right players to the right spots quickly. He also still has a better variety of moves to go to if needed to score than Mills, who will 90% of the time rely on long three point shots. Parker is a craftier scorer in the paint and even in the mid-range area of the court.