GVR4 has a factory rake with rear being higher. The H&R springs also keep this rake. I know people who have cut off 1/2 coil in rear - its the progressive part, so does not hurt much to level it out with H&R's. I have done it too. No impact to ride height etc.
I don't know about the whiteline springs and what they did. I think those were stiffer than H&R. I have not seen a set for sale on here in forever.
If you do DSM springs all around, your rear will sit lower than front, I believe. Same with coilovers unless you got a taller spring - I know I had this issue with Koni GC from a 1G many moons ago. I had to get a taller spring in rear.
Interesting fact - Koni has discontinued 1G AWD struts...Sad!