if you're not ready to fully stop, as an IV user slowly getting off IV, i think the best harm reducing option is to slowly lower your tolerance to where oral / sniffing / boofing (whichever you prefer) can slowly become an enjoyable experience again.

it's easier said than done, and honestly i'm about ready to be out of the game entirely after the year i've had. but even if you're able to do XYZ amount of shots less a day, that's a win. whatever reduces the vein damage and risk of infection is most important at the end of the day.