Run the offense through Rondo. When not running the offense through Rondo, run the offense through KG - he's still more than capable of creating good looks for himself and others when he's on the block. Give Perk an iso or two a game to keep him happy, but otherwise relegate him to garbage buckets and dunks off of feeds from KG.
When the bench is in, go ahead and let Nate jack 'em up - that's what he's best at. Tell Sheed to stay in the paint (although this isn't likely). I'd seriously consider playing TA over Quis some. TA had been playing great and is now getting squeezed out of the rotation because of Finley's arrival.
Also, I actually heard Donny make a good point in the postgame last night - Rondo hasn't really learned how to help guys get going yet. If Ray's only taken three shots, he needs to find a way to get him the ball. If KG, or Finley, or Nate or whoever is in the game with him has a hot hand, he needs to find a way to get them the ball. There are certain shots that I can just do without unless the shotclock is running down (the Sheed 3-ball comes to mind immediately), and I think Rondo looks for Sheed on the perimeter a little too much (as an example).