The device and coils don't really know whether they're vaporizing salt or freebase, or how much nic is in there. So you don't really select a device based on whether it "works well" with salts.
It really comes down to what you like and your style. If you prefer dtl/mtl, airy/tight, dense/loose, cool/warm. And if you're getting the amount of nicotine you want. The only difference in using salt vs. fb is salt is smoother, so you can tolerate higher nic levels. But it also gets in your bloodstream faster and more efficiently. Salts gained in popularity mostly because of that quick absorption, and the fact that small devices like Juul don't deliver big hits, so a small puff of high nic would satisfy.
So I'd focus on getting the proper feel you want from the vape, and adjust with juice from there.
edit: sorry, I don't really have advice on the coils. Smok does have a ton of choices, and I don't use drop ins anymore. But someone will be able to help with that.