my two bits.
I did my truck the cheap way cut coils on the front for about a year. Cool for a little while but 2.5 spindles 2inch or 3inch lowering springs the way to go. I still cut of 1 coil on the 2" springs to be crazy. But I like my stuff slammed.
The rear end for me, I use my truck daily and my work is welding. I need to haul weight if its engine or metal. I would C-notch for sure. I custom made mine. It was easy. I want the rear lower to level it out but Ill live with it. 6/6 drop.