Made a similar post a few weeks ago...Definitely wouldn't include Sullinger. If anything Kelly Olynyk. Id be reluctant to give him up too tho.
For Johnson I'd give them Crash, Bradley, Bass, 2015 Clippers pick, and maybe the Cavs pick. Essentially they'd be getting AB and picks for a 33 y.o Joe Johnson. Johnson is versatile so he could play SG or SF; which means Evan Turner could also be included in a trade for JJ as well.
A line up of Rondo, JJ, Green, Sully, Olynyk (until we get a rim protector) would be good. Would allow us to go small with a lineup of Rondo, Smart, JJ, Green, Sully instead of Bradley at the 2 and Smart at the 3.
Id also consider throwing in Olynyk, Young, a filler, and more picks for Brook Lopez if he becomes available!