I have run 4mm total toe in.. but it was for Jorg Bergmeister in a 997GT3Cup
I would call your numbers "backwards" for a street driven car.
1-2mm total toe out (for autoX) and 1-2mm in on the rear (or zero)
I have tried toe out in the rear, it works well, but it is not for street car, and you better know what you are doing behind the wheel.
For track cars with no power (2.5 Spec car) at places like Daytona, I'll run zero toe in the front or rear for less scrub. I want to roll as much MPH as possible
B