Hyperacusis is an unpredictable, shape-shifting beast that seems to be different for everyone. Granted my experience is limited as I've only had this life-destroying condition for about three months, but my main recommendation would be honestly and ironically to play it by ear. Whatever works for you, works for you. For some with recruitment based hyperacusis (as in sounds are unexpectedly loud), I imagine sound enrichment and pink noise therapies can really work wonders, but for others with the delayed nerve-related "sunburn from hell" ear pain, which is what I have, I don't know if I can say as much. For me the only thing that has worked is long stretches of silence followed by maybe some light noise exposure (if it doesn't hurt), and then continued lack of exposure to especially loud noises. Rinse, repeat, and adhere.