From what I have read, and I've read a lot, some Jeeps can have front drive shaft/skid plate/auto transmission pan interference, with even a 2.5" lift, when the suspension is at full droop. (The skid plate can be cut for clearence, btw, and there are several aftermarket replacement skids which have the clearence built in.)
The result of the interference is a ripped DS boot, which is there to keep in the grease needed for the splined joint where it belongs. Once the boot is torn the DS is on it way to failure, but a steady maintenance schedule seems to extend the life for some to a year and more.
If the boot tears and the shaft does need replacement, a double cardin shaft is the typical, popular remedy, but they are frought with issues, like vibration, and that is, imo, the leading candidate for the cause of transfer case failure. AEV offers a thinner front repzeppa DS that cures skid and transmission interference on 2011 and previous JK's and doesn't have the potential vibration issues.
You can test for potential interference by installing the springs and then lifting the Jeep by the frame (on a lift for safety, not a jack! IMO, not even jack stands.)
Also, if you lift the Jeep without correcting caster you will end up with flightier steering than you had pre lift. With a ~2.5" lift, this is an issue for some drivers and not for others. For example, I put a 2.5" Teraflex BB on my wife's Jeep (2.5" = 3" front and 2" rear according to TF) and I imediately noticed the flightier steering, which was a minor change, not drastic. My wife never noticed at all.
Some have reported that OME springs produce more than advertised lift. I don't know if that applies to all combinations of OME springs or not. As the end results of the lift increase, i.e. toward 3" or 3.5"... the steering issue will increase and so will the likelyhood of front DS interference.
Caster can be restored through adjustable upper or lower front control arms, or if the lift goes ~3"+ with AEV's inexpensive and inovative control arm relocation brackets. The brackets are effective and greatly reduce pinion angle issues and front driveline verticle movement. They are a bit controversial since some think they are rock magnets. I have them and they are really effective at improving ride, reducing braking dive and have yet to get whacked, but rock crawling is only an occasional use of my Jeep. AEV is coming out with a 2.5" spring lift shortly, they may have a caster correction solution with this new lift for lifts around 2.5", but their current front control arm barckets are only suitable for about 3" or greater lift.
As a last resort for caster correction, the oem lower control arms have a knock out adjacent to the rear mounting hole, which can be removed for use of cam bolts. Not a great option compared to the AEV brackets or adjustable upper or lower control arms.
Done right, lifting a Jeep causes no problems. I have AEV's 4.5" suspension on my Jeep and have had no issues after ~33k miles.
Also worth noting, my wife's Jeep has no interference issues with the TF 2.5" BB.
Hope this helps,
JPK