I didn’t. As long as your tires are just regular medium/soft compound daily driving/all season tires, you won’t see much camber wear on 15’s
I drove on bald Michelin’s for 4 years that only had the outer tread and there was barely any difference in wear
You need to be more worried about punching holes in your shock towers with the control arm at that height than camber wear. Just tweak your height until it stops bottoming out of you wanna stop that from happening. For me I needed about 1-2 inches of wheel gap to keep from bottoming out the suspension travel.