there is some great RSO on here (I can recommend mjconcentrates https://littlebiggy.org/viewSubject/p/4771061 and drugs inc UK https://littlebiggy.org/item/1AUOPhc96c4Vt3NpI1bqJ9k3/view/p).
i use it for my fibromyalgia and it's amazing. not 1:1 ratio though, and very much gets you high, but it might be possible to use a tiny amount at a time alongside a CBD isolate. I have tried this, but I also like the high so I just go with it. understand it's not for everyone, though.
best wishes to all of you dealing with chronic pain too.