Some offenses are built around one player. Some are built around the styles of more than one player. Some offenses rely on the fast break, while some can set up in the half court and take their time scoring. Some offenses have one player distributing the ball to all the others, while some offenses are built on the premise that all players should pass and shoot equally well. Some offenses incorporate the three point shot into the offense, while others ignore it unless it's necessary.
Some offenses are reliant on the starters while others heavily involve bench players.
These are tough questions, questions without definite answers. Every year, NBA coaches try to find the right answers, but they often end up finding many wrong ones. Sometimes, though, a team shows up that runs so smoothly that no one can stop them. It didn't seem to matter what positions good scorers play, only that there were four of them who got a lot of playing time, especially in starting roles. Even the age-old theory about needing a good center to be successful in the league appears to be only a myth.