For one thing Rudy is not in any way shape or form a small forward, Brandon might pick up a few minutes at that spot, but Rudy will play at the one before he'll be primarily tasked with guarding 3s. Travis has never played 30 minutes per game and is likely to play more backup power forward than small forward. Martell has never played 30 minutes per game and unless Nic has drastically improved his offensive game I don't see him getting much more than 25 minutes a night (he mainly needs to show more aggressiveness and the mid-range shot off the dribble he was practicing toward the end of the year)
Furthermore, I'm not convinced Martell is going to be fully healthy ... But for the sake of argument, let's say that he is. A minute distribution could look something like this:
Roy: 36
Aldridge: 36
Oden: 30 (give or take)
Miller: 30
Rudy: 28
Nic: 24
Martell: 20
Travis: 22
Blake: 18
Joel: 18 (More or less depending on Oden)
Bayless: Spot minutes and DNPs
Cunningham: Spot minutes and DNPs
Pendergraph: Spot minutes and DNPs
Of course it's possible one of Martell, Nic, or Travis could command more minutes at the expense of somebody else, but them's the breaks. Overall I think Bayless is the most likely player to sit (aside from the two rookie second rounders).
One little problem with those minutes though. There are 240 minutes to go around and your minutes add up to 262 not counting the spot minutes.