Historically Barnes' teams usually have 8 or 9 that see 10 MPG or more.
Last team to have 10 players play 10 mpg or more was the 2016-17 season, but of the 11 players that got those minutes 2 of them (Mostella & Fulky) played 15 or less games on the year.
I think he'll play more than just 9 players, but for me a rotation is guys that get to play 10 or more minutes a game on average. So I think the 9 I listed are most likely to get 10 or more mpg. I think we'll see Mashack, Tobe, and possibly even DJ some this year...
I think DJ is the most likely to RS and/or transfer though. I always hope that we don't see attrition, but with how transfers work these days has to be expected.