That's a lot of reading, but like the other thread says "wheel and tire sizes can be...confusing." Outside of the necessary specs, the choice to go staggered or square is your choice. I've always assumed the AWD models all got square 18x8 - 255/45 setups, but I guess not given the tire specs you gave.
The benefits of a staggered setup really benefits RWD cars because you obviously want to maximize the available tire contact patch on the two wheels that put all the power down. This should be less of a problem with AWD because all wheels are doing the work. I understand the Stinger is RWD bias system, but the computer is going to send grip where it finds it among the four wheels for AWD. The most important thing for AWD cars is to keep the diameter of the tires the same (or very close <3%), which is where you get into a fun game of matching tire width and recommended wheel width.
I just purchased a new set of wheels and tires (F: 8.5x19-225/40 R: 9.5x19-255/35)and thought the 255 would look too stretched on a 9.5 rim, but after installing it on the car, I love it. Now the front and rear have a similar sidewall stretch and look fantastic.
I would recommend talking to
@GetYourWheels if you have more questions.
The Braelin BR10's don't look bad btw. They look similar to the Variant Radon