Your obsession over TT is disturbing. He needs traded along with the rest o the Clarkson's and Nance's(who is probably untradeable thanks to that awful contract). He gets abused physically and it is just sad.The only player they should think about keeping is TT. Knight should be playing over Delly to just see if he can play well and get someone interested in both him and his contract. No one is going to come calling for Delly or Henson as a player at this point, they will be purely expiring contracts.
Knight or Clarkson might be able to be traded for another expiring contract, especially if that expiring contract is a real bad player or injured.
I would trade TT if the value back is right. TT has alot of miles on him for his age. He could end up another Varejao situation. I'm not even sure what you pay TT at this point or how long of a contract you give him.