It's pretty obvious that the LMA/Pau tandem is going to get torched in the postseason & Fat Head is completely out of the rotation. Despite being past his prime, Chandler is still a very good team defender/rebounder. He isn't the rim protector that he used to be but he can still move laterally better than most centers especially Pau.
Chandler still has 3 years left on his contract including this season but if he completely falls off like Boris then they can buyout his final year & stretch him. PJ Tucker is a very good defender who can guard 3s/4s & would be an insurance for Simmons/Bertans. If he can regain his shooting stroke then he can play the Jefferson role if needed.