Anything over 3" lift you should and will need a SYE and CV driveshaft. If your jeep is stock then you would have regular driveshaft, the only jeep that wouldn't would be a Rubicon. A TC drop would be a last resort if you can not pay for a SYE/CV. The TC will lower your clearance and you would most likely still get vibes if it is not setup to the right measurements.
Here's a picture to help you out on a CV vs Stock driveshaft. CV is the top one and stock is bottom.