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I have the same wheel and tires specs, and when I was lowered on just Tiens I didn't have any issues or need any additional camber...but after the bags, the camber was needed to tuck.
If you need additional negative camber, go for the Megan upper control arms for the front and the Megan camber arms for the rear. The SPC balljoints will let you adjust 1.5* either way, but I think the Megan arms will let you go further.