If you put in a 2/2½" lift (spacers)--
If you don't go off-roading--stock shocks are ok
If you go off-road and do even minor "flexing" and EASY, the stock shocks will "top out" and limit you tires downward travel, it won't hurt them--for a while
Since your jeep is now HIGHER and you COG is higher, you really need some stronger shocks than the stock ones-SO
If you're going to lift your jeep---you really should get some new shocks--DESIGNED for the additional lift, travel
RS/Bilstein/MX--do some "search" for good shocks !!