You've gotten odd and wrong advice for rear tire pressure. The way you currently run is best for helping over-steer (pressure biased to 4-6psi higher in fronts), while maintaining good handling characteristics.
You would have to pump the rears up until they were hard and ineffective to help over-steer by increasing pressure, and then the car would handle poorly and even dangerously in high leverage evasive maneuvers and/or high speed cornering. Who told you that, your competition? I think the people who told you to pump the rears higher than the fronts want to see you do worse than you currently do.
Running a tiny bit more toe-out up front will help with tire wear on the outside (and help rotation, so test accordingly). Of course, lowering the car with stiffer springs, until the FLCAs are just short of ground-level will increase front negative camber as much as possible for cornering.
Keep doing what you're doing, it sounds like you are on the right track (pun intended).