All i know is that dominant guards are important. Guards who can attack the basket and draw fouls.
http://espn.go.com/nba/statistics/pl...n/point-guards
http://espn.go.com/nba/statistics/pl...hooting-guards
Nash is a shooter. At best he can trade baskets with the other guards, but he will never put pressure on their bigs. He will never challenge Ibaka, Bynum, Bosh, Chandler, Noah and co...