I like the idea of playing sully at 5 especially against teams with smaller centers. Sully is our best rebounder, put him in there with a small ball lineup and let him outlet to start the fast break. Example Sully,Green,Lee,Terry,Rondo.
When teams go small to match this lineup they end up with less interior defenders. This gives Sully more room in the post and less shot blockers to worry about.