At 50 mm of lift I've got stock length end links. I actually found that ones off my old XJ IRO lift kit fit the rear of the XJ, they do away with the balljoint style end(which was shot on mine) and replace with a dogbone with some rubber bushes in place.
https://www.ironrockoffroad.com/prod...bar-links.html
One thing with disconnects I've found is you are constantly sitting between having rattles and them being too tight to actually disconnect.