Your dealer is not doing you any favors adjusting in compensations. Take the alignment specs below to an independent shop that understands live axle setups and compare your vehicle to the “Nominal” specs in the image below. Notice they are even side to side. They may not be able to get it perfect but the closer you are to those nominal specs the better. Throwing money at adjustable arms at this point is pointless until you know for sure you don’t have damage or issues preventing your rig from being set properly to stock specifications. There is plenty adjustability in the stock suspension (assuming you don’t have a lift or damage) to hit these targets.