I just got a bunch of oils and chose what I liked, no need to over complicate it. I had a friend who was a ‘nose’ and made scents for companies like hotels with croissant smell in the aircon so people would get room service, mildly evil, but it got me thinking, can’t be that hard. I don’t have hyperosmosia, but I know what I like, and I’ve found what makes me happy, and it does. It’s an entire sensory playground, just dive in with whatever you already like and keep trying new things (said friend had a shitload of scents, got me started). To say use this or that would be to do you a disservice, find what you like. Will say coffee beans are a good way to cleanse the nose so you can smell things anew in a reasonably short time (sensitization is real). Think that’ll do for now, circle back if you explore, but I’m no expert, just a happy amateur. If you’re a reader, check out Perfume by Patrick Suskind. ETA: bit dark, but does an interesting job of writing with smell as the primary sense, unsurprisingly the movie fails to achieve that,