The salinity needed to affect the parasite to any great degree would also have the same affect on the fish being treated. Hypersalinities are not an affective treatment. Raising the temp is also not recommended. It has absolutely no affect on breaking the life cycle of any parasites. Most optimally reproduce at or near regular reef temperatures. Some like Cryptocaryon irritans, optimal reproductive temp is 86°. While you might think "great, I'll get rid of it faster", it actually has quite a negative effect on fish. Higher temps also affect the pH of the fish's blood making their immune response much slower and ineffectual.
Cheers
Steve