I'm not convinced we need another backup point guard. Quite frankly, I don't see Bibby or Ford or anyone else with any talent coming to this team to play the whopping 5-8 available minutes behind Rondo in the playoffs. Thus, any player we're going to pickup to play the backup 1 is likely going to be some D-League guy no better than Avery Bradley.
Thus, I think we could afford to sign Leon (Luke's replacement), another big (Erden's), and another wing (Daniel's).