That will probably be the starting 5. Brock and Allen will have their hands full with Marcus Smart. You would love to have Allen pressure him all over the court but Smart is just to big and strong for Corey plus USF cannot ever allow Allen to get into major foul trouble or they're done. Brock is not an offensive player and using him on Smart most of the game will probably be what we see. Brock is also a clever flopper so I expect him to get at least 1 offensive foul on Smart during the game. I also see Smart covering Brock and not Allen since Corey could cause problems for him with his quickness and motor. Covering Brock allows Marcus to save all his energy for offense.The thing is out of the all the guys on USF roster that matches up best with Smart from a physical standpoint is Abdul Aleem, but his bad footwork on defense would doom him in that matchup.
Defensive rotation will need to be the best it can be all season long for USF to win. Smart will get a lot of attention and help guarding but whoever is leaving his man to help, USF needs to rotate to that open man. If our rotations are slow, Okie st will destroy us from long range and at the basket will put backs and drop off passes.
You mentioned Leday and I can't help but wonder what is happening to him. He had a better motor going last season and really came on strong down the stretch. I'm pretty much done with the overrated and soft Javontae Hawkins but LeDay I had high hopes for, still do. USF needs him to be a scorer and rebounder this season.
On defense I think USF should have Allen guard Smart really tight to possibly get a steal or at least cause Smart to waste energy dealing with Allen's annoying defense. The important thing is how USF comes over to help once Smart drives the lane. There needs to be better rotation down low when Egbunu comes over to help on the ballhandler driving the lane. Rudd(or another big) needs to rotate over.
How is USF going to operate on offense against Ok State? Get the ball into the post? or have Collins drive and dish? Ok State is so athletic I think it will be extremely difficult for Collins or Allen to drive in and get those layups that they have been getting the last couple of games. IMO the only players who are going to score any points in the paint are the two bigs and Rudd.