For a play-in run, Oklahoma City has to have a reliable bench with little drop-off. Oklahoma City is on a serious roll lately, and a win over the Hawks Wednesday night would put the team at .500. Obviously, Shai Gilgeous-Alexander has been the catalyst to the Thunder’s success as a team this season. His leap to the next level has given this Thunder team a new gear. He’s averaging 30.7 points per game, shooting 50.9% from the floor and commanding OKC’s offense. The supporting cast’s progression has been notable, too. From the start of the season now, players across the…