Please read because I was in your shoes. I wanted 33's and didn't know what to do. I didn't want to deal with a sye and pinon angles when I knew nothing about building my jeep. I picked and ran and still run the Ultimate 2.5 OME lift, 1.25 JKS body lift. That was an absolute fantastic lift for my jeep with 33's (first picture). and the DIY highline Kit that moved the fender up 3 inches was only added because I went to a bigger tire and did not want to change lifts or go any higher. When you add up my various lifting styles, its roughly 6.75 inches and I run 37's. I have had no problems with playing in the rocks. I am considering going to 3 inch shock to allow more down travel but I would not have been able to run my 37's without the highline.
The Ultimate OME 2.5 Lift was fantastic for me with my 33's and I highly recommend it. DPG off road is fantasic and I highly recommend the extended travel shocks.
The highline took me a whole weekend. Friday after work til Sunday around 6pm. Be prepared, it really isn't that hard to do. The battery does not need to be relocated but you will have to modify the fender brackets that attach to the firewall. You will have to rotate the evap system to make it fit under the hood (unbolt, rotate the brackets, cut one section off with a cut off wheel, and then rebolt to the fender using extisting bolt holes.
The biggest issue was the windshield washer bottle. I had to make a new bottle but that consist of just drilling a new hole into an empty bottle and moving the pump over.
This is the ultimate 2.5 OME spring and body lift with 33's. Perfect LCOG lift in my opinon
This is the Spring lift, body lift and highline with 33's.
This is the spring lift, body lift and highline with 37's
After everything I still have the 4 inches of uptravel from stock. I used the formula of how ever big you increase your tire size, you need to move your fenders that far away. 31's to 37's was 6 inches. I moved the fender up 6.75 by using various lifting styles. I haven't had any complains a year later and countless trail miles.
In my opinion I love the LCOG. For me it works and suits my style of wheeling better and I feel much more in control of my jeep. But to each their own. I would recommend doing the high line kit only if you are going with a smaller spring lift and bigger tires.
Technically you could get away with running the high line kit only and moving your fenders up 3 inches but you wont be raising your gas tank, bumpers, t-case skid, or body mounts up that would be better for off road (if you choose to do that). If you are going to stay on the street, a high line kit is a feasible option. I wouldn't recommend it but it could be used as a replacement for a lift if you never decide to go off road.
As for the bushings, I would get new arms personally. And if you are replacing springs, you might as well do a lift kit because you will be doing half the work already. You would be working twice as hard and long to do a highline kit and swapping out springs and arms/bushings.