Ketamine, so badly or MXE. I truly don't care! "Twenty-four hours to go, I wanna' be [dissociated]!" in honor of The Ramones
AB-FUBINACA, the one synth-can I love and it gets me faded, while also providing warm analgesia and anxiolytic properties. I mean shit, it was studied as an analgesic by Pfizer. I'm glad they didn't use it. It's cheaper and anybody who needs can utilize it as such. I think it would be helpful during opioid WD's, with the analgesia and all. I mean, as well as stoning and trippy, it's analgesia is prominent too.
LSD. ~200mcg< or more; combo i.e. LSD + MXE + 200-250mg MDA + hash/wax dabs + etizolam and end it with a shot of MXE & morphine, alongside more etiz or diazepam. Thinking of these cravings is like describing a sex fantasy for myself haha!
Mushrooms, in particular P. Cubensis (Sold around here as "Thailand Boomers" very thick white, blue, purp stems with blackish golden caps, specific grower here Im thinking of), it has a little bit of everything in terms of psilocybin, psilocin (the obvious) and baeocystin/norbaeocystin which is known to have a gentle, hallucinogenic effect. IMHO very enlightening spiritually, ego-death, introspection, beautiful visuals, and IME can be sedating, alongside cannabis especially it brings back dreamy visuals, but can let one drift off to sleep or just relax and think about the trip, while still tripping. Ah, beautiful memories

Cyanescens too, but those can get DMT-like at higher doses and heavy trips can start at half an eighth or such.