Quick not on tire pressures: Non-gravel/rally tires (basically all DOT) need to be high PSI to prevent debeading. But do play around with pressures to see what works best. My first year, I ran +8psi over the factory recommendations. But as I've raced through the years, I've actually set my fronts (in a FWD vehicle) 4psi below factory, and rears 6-8 over factory. I've yet to debead with those settings, and I get as much grip as possible up front while the rear loves to rotate. I never thought I could send a FWD van sideways so easily.
For your RWD set up, try taking a few PSI out the rear until you find a sweet spot between rear grip and good rotation. Most debeads happen in the front tires, but I've seen the rears go as well.