Because they are equally talented, I have to assume that takes care of all physical aspects of the game, such as who is going to work harder on their games. Therefore, my answer is...
1. Coaches who can figure out the best lineup.
2. Coaches and players who understand basic game strategy.
3. Coaches and players who understand advanced game strategy.
4. Overall environment of belonging, accountability and competition.
5. Players with a good head on their shoulders (the fewer head cases, the better) who can stay on as even of a keel as possible, but still have some adrenaline going.