No need, I've got no issues with mine running standard length Icon shocks. If you are planning on getting Metaltech 4x4 long travel rear then it might be a good idea, or maybe necessary at that point.
I upgraded mine to SS braided, and the kit I used happened to be +2 on all lines.
While it worked fine, it left more slack than needed up front. Definitely not needed for a regular lift. You actually have to be more careful during install to make sure you they don’t get in the way or snag on anything.
It depends on rear shock length. My fox rears for 2-3" lift (24.8" extended length) were a little too long for the brake lines from the frame to rear axle at full droop. Easy to test by jacking up the rear from frame. I went with extended lines from metaltech, crown performance brand I believe but goodridge are nice too.