Blank, dang son I have never even heard of a stawberry/cayan cross. I have grown both individually and would love to grow what you describe. (I hope you are talking about actaul fruit and not using codespeak)

Most of my experience has been with OG Kush types. Mostly with what used to be known as SFV OG and I grew that from clones only. At one time the OG I was growing was considered by many to be the best there is as far as quality. Samples from the guy I got the clones from were actually part of a High Times Magazine TOP TEN Issue a few years back.

If you are looking at clones in a dispensary you should let them know that you are specifically looking for pain relief meds with very high potency. The road to getting what you need is to ask for it rather than letting them guess. Additionally you will probably need to talk directly with the shop owner/operator rather than the sales clerks in order to reach the most knowledgable person involved. You are looking for something high in THC but also high in the other cannabiniods (spelling?) I think but I am now getting way out of my personnal knowledge area so I will stop now.

Growing from seeds is a terrific experience but clones are your best bet for reliability. In LA appropriate donations for clones seem to run in the $10 to $15 range.

Hope this helps,
Max Blast