I would say, as long as Wheeler is <15min (prefer 10), AND he is not in at crunch time (if game is close), then I think he can & will contribute, because as said above, you have to give Wallace some rest to get his best.
The one game even I was screaming at my tv when we were trying to hang on for the win at the FT line, and Cal had Wheeler, Ware, Toppin, Wallace (when he was still struggling at the line) and I think maybe Reeves in there due to a couple guys fouling out or injured. And the best of those (Reeves) at the line was in-bounding the ball so would not be who got fouled. I was like put in Livingston and Theiro for Wheeler and Ware.
Wheeler can't be trusted at the FT line, especially in a tight game.