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Toe is the most important factor for tire wear.
Camber (static camber) can have an effect on tire wear, but the idea for camber is to balance inner/outer wear to your driving style and utilize more contact area when you need it most.
Caster only affects the front wheels, and it's not adjustable without camber plates. This is the axis the wheel steers around, like the angle of a bicycle fork. It helps the tire lean into a turn, and can be considered "dynamic camber" because it changes the tire's camber as the wheels are turned farther.
If you're 98% highway miles, then OEM to -1° F and -0.5°R would probably be just fine.
If you have a more "spirited" time behind the wheel and uh, well, frequently capitalize on any opportunity to utilize more lateral grip, then -2 to -2.5 F and -1.5 to -2 R should be fantastic. The idea here is to square up the tire's contact patch in a loaded turn when the outside tires are weighted.
There's no perfect alignment for everyone, the factory just gives safe ranges to make the car understeer and more stable.
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