Anyone have this setup or what do you think of it?

I was looking to do a prodrive spring set up (linear spring rate rather than progressive). I believe that most say GC8 front AGX fit fine on the wagon, but the back are too low, and WRX AGX fit the back ofthe wagon. I also need a set of Perrin solid end links for the rear. One of my Whiteline endlinks just broke. Would I need to get anything else? Pillow ball mount? Camber bolts? I don't know much about working on suspension beyond what I have read online for this car. I am used to older muscle cars, not imports. Having bought the WRX wagon, I apparently have limited my options.