My guess is that Shaver, Rice, and Dennis will get less than your prediction and Akot, Doutrive, Milner and Naje will be higher.
Akot, he was said to be the best player on the team last year. Rice said he made the biggest one year improvement of any player he's ever coached (coach speak, for sure, but it isn't all hyperbole. There is truth to it). Especially considering Alston made the biggest one year improvement of anyone in the country two years ago and Hutch went from 6 ppg to 18 ppg in one year. I really think he, Alston, and Doutrive will be 1, 2, 3 in minutes played.
Doutrive, by most outlets, he was considered the best "get" of the transfers. Kigab was considered the weakest and he came in and averaged double digits right out of the gate. I think that him being able to play both the 1 and 2 will keep him on the floor a lot more. Thats also why I see Dennis and Rice's minutes dipping.
Naje, he's the biggest wildcard. He's the first JC 1st team All American Boise has ever landed. But he also has a body type and skill set of several other players on the team. He should get minutes off the bench, but could provide a lot more if Rice decides he can rotate into the 5 spot like he did with RJ last year. He does have a solid low post game.
Milner, he is a high upside guy but low on experience. He should get 10-15 minutes spelling for Armus, that is unless they choose to go small ball. They do have the overall length and size to probably make that work.
Kuzmanovic, I'm not sure what to think of him. They really could use another shooter, but I'm not sure who's minutes he would take. There is already not much to go around.