very small sample size, but from what I saw of Bostick on Tuesday, would be amazed if he doesn't take all of IW's minutes by Big Ten season.
For DZ, I think his minutes will come in playing the 4 spot when Watkins/Moore/Banks/Stevens get into foul trouble such that 3 out of those 4 need to site as they have 2 fouls in the first half and Chambers goes to DZ for some run time to make sure they don't pick up that 3rd.
Carr-Samuels-Garner-Reeves-Banks-Stevens-Moore-Watkins are going to play about all the minutes. Bostick picks up a few if he continues to develop is game. DZ most likely only when they need him in foul trouble. IW is going to struggle to find minutes unless he finds an outside shot.