your set up is very close to mine. I run 1" bumps front and rear and for me that is perfect fully flexed out. I run Falcon 3.1 shocks the 1.5-2.5 size but in back could probably go the next size up. it is a flip of a coin. I get pretty much max flex with this set up. this is with 285/75-17's Running hard trails in Moab I still am not quite bottomed out on the shocks so for me 1" bumps are perfect and maximize my articulation. I was there in June and just got back a few days ago again.