I think they can coexist, but it might be better to have Sully coming off the bench rather than start next to Monroe.
I'm hoping that with Sully losing weight, it helps his perimeter oriented game. I got the feeling that he didn't shoot as well as he could have because he was often tired. Losing weight will also help him drive closeouts and get to the hoop.
That being said, if we get a good offer for Sully I would deal him in a heartbeat. I don't trust him to stay in shape after his next contract, so I don't want the C's to be the one to sign him to said contract.
I think there's a perception around here about Sully's poor shooting because of the lack of success with the 3-point shot.
He's pretty good from just inside the 3-point line though, particularly from the right elbow and from the top of the key. He's actually better than Olynyk from outside the paint, but inside the 3-point arc.
Still needs to improve on that area, but I think if you got him to concentrate on those areas he'll be deadly.
I'm still a fan of Sully extending his range to the 3-point line. Disappointed it wasn't more accurate last year, we'll see how it goes.
Oh, and Sully + Monroe rebounding will be awesome to have.