the one I keep coming back to (though I don't know why they would do it) is LMA to WAS for Okafor, Seraphin, Livingston and their draft pick. With Nene, Okafor is an expensive luxury and Seraphin isn't getting enough burn. Wall/Beal/Ariza (or Vesely)/LMA/Nene can do pretty well going forward in the east. Okafor is about the same cap hit as LMA for the next two years, so we don't lose our flexibility this summer while picking up Livingston to back up LIllard/Wes, and another project big. And WAS's first, which would be late-lotto to mid-first, but since they started off this year crappily there isn't much chance they'll give up a pick this year unless it's heavily protected.
The other options that I'm intrigued with (Gibson + picks/Mirotic, or Ibaka + TOR's pick) are under poison pill and horribly tough to trade for. To GSW for Lee and Thompson isn't enough, though I like Thompson a lot -- Lee is paid a bunch for a long time to not be close to an All-Star PF.