Shackle issue

I recently got the RC Shackleton relocation backers for my XJ. I found out that you can't use stock shackles and need longer shocks. So I want to know if I do all this, should I just change my coil springs in the front to a higher lift? Or just leave the shackle alone? Or possibly do a smaller leaf spring in the back? I'm currently running 4.5 inch lift and don't want my back end to stick up super high.