Kings need to focus on removing Kenny and Miller's contracts from the books first. They are for one, longer, and two, much more unmoveable players with their contracts.
While I do feel Mike Bibby will need to be moved to rebuild, simply due to the large size of his contract...he shouldn't be the main concern right now unless a deal is right for the Kings.
The Kings can trade Bibby, but, if they don't move Miller and Thomas, what they get in return for Mike right now most likely wont help enough with Miller and Thomas still eating away at the cap.
Move Thomas, move Miller, then worry about Mike, IMO.