It's possible that Kemba has negative trade value. The way I see it, he's close to untradeable unless we swap him for another bad contract (let's say Blake Griffin, Love, Tobias, Westbrook etc) or we throw in some sweeteners (picks/prospects).
Personally speaking, I'd consider trading Kemba for Tobias. He's massively overpaid, but he's a versatile player, he's 2 years younger than Kemba and he never had major injury concerns throughout his career. Not sure whether the Sixers would pull the trigger.
Smart - Teague - Pritchard
Brown - Romeo - Edwards
Tobias - Nesmith - Green
Tatum - Grant - Semi
Theis - Thompson - Timelord
(Or Tobi at the 4 and Tatum at the 3. It doesn't really matter.)