The best lineup is probably Cousins, AD, Kuz, Bron, Green. Cousins is a negative on defense but it is negated a bit by having him and AD in the same lineup. Guys are going to have to properly rotate when teams try to put Cousins in the pick and roll, though. AD can guard 1-5 in a pinch, Green can defend forwards and guards, and Bron can still defend bigs and forwards. One can hope that Kuz can become an average defender, as he is going to have defend forwards and guards in this lineup. The bench is kind of trash outside of shooting though. A Jeff Green and/or a James Ennis would have really helped in that regard. Oh well.
This is all pretty simple. I really hope the coaching staff does not fall into the trap of starting Rondo.