I never had much luck w/ isolates at the bench. What I did find successful was calculating my blend at crude, then just processing as normal. My best sample was stable for 2+ years, fresh material and nothing else. I imagine it would have held up even longer w/ terps, maybe. (In retrospect, I would guess the stability also has to do with the process environment?)
I think the same concept could be used for live resin to produce some interesting compliant things.