Raising temp is not the good choice in treating s/w Ich. If anything I would chilled down the temp. I would not recommed this for you though.
Raising temp on healthy and/or sick fish will do more harm than good. I dont know how much basic info you have on bio, chem but higher temp will result in higher respiration which will consume more energy which can be used to combat disease.
As far as Hypo, I neven went Hypo that some uses at
SG of 1.010 or lower. I never tried such so no comment. I have kept as low as 1.016 but with mixed results which tells me that effectiveness of treatment depends how one correctly diagnose at early stage and apply CORRECT treatment. Try Reefland, Reefcentral or manhattan reef for actual result of their experiences with ich. Dont assume their opinions or their experiences are always correct either but I am sure you will find more veterans at such forum. Use it as guide and reference and along with what you obtained from research, you will learn or develop a method which will work best for you.
Should keep journal of all the behavior changes, symptoms and course of action, water conditions and result, and I am sure this journal will benefit many fish in the future as long as you dont repeat the same error.
I have found many effective ways of treating diffrent fish with different methods on same infestation which I have learned (expensive but worth it since benefitted lot more fish) as I experienced such over many yrs.
One should really do research on diseases and put some common sense behind it, and Most of all Dont jump the Gun. I have seen and heard more death due to such than actual death caused by infection. Well, Just an opinion. I hope you can post pics soon and Hope all is well!