SOOO testing things for @ssspringroll I figured these assholes use enough accessories that I consider part of their normal genetics that if anything WAS going to texture clash it would instantly, the main culprits being eyelashes and Trace's horns.
sooo I use this skin by Octetsica for Trace and Valuka n6 body preset on Both Vis and Trace, along with Northern Siberian winds overlay (YES Trace is on a male frame, they both actually use the same body preset just different slider adjustments/fat/muscle)
First up Trace's nips, your making me expose my dirty secrets. I KNEW they would not be a fit for the nips just because NSW's overlay has nips in a weird placement that don't even line up with the 3d nips on the Valuka n6 body preset (I have to edit the 3d ones out whenever they catch the light in screens). The piercing's however seem to fit the 3d ones on the Valuka preset for the most part. Vis uses a different skin but the overlay that moves the nips is the same. However his muscle slider is maxed and fat is about mid and they did not play nice with him, some options didn't show up at all. but it's fine the Valuka n6 preset gives some major pecs so it's expected. (Trace is I believe close to the bare minimum for fat and muscle) I don't think I've ever been able to get nip piercing's on these two so I would say they function fine on bodies closer to maxis defaults.
As expected, the nape and hand piercing's had no problems and I'm highly considering giving Vis the hand ones permanently I mean just look at him!
I also couldn't find anything they typically wear to texture clash
So overall I'd say your good, the NSW overlay nips and the beefyness of the Valuka N6 body are not issues your cc caused and if they were adjusted for these overlays and presets they would no longer work well on default bodies.
Thank you for letting me test!!! if you need more info let me know!