Afghani would have the biggest couchlock effect from all the strains on your list. Probably good for treating insomnia. I think Herijuana, Bubba Kush, or Hindu Kush would be your best bets for pain relief...depending on the type of pain...Herijuana is said to be the heaviest indica out there. White Rhino is also well known for its analgesic properties. Strains high in CBD, such as Cannatonic, are most commonly used for medicinal purposes. If the source of pain is inflamation, try a THCV rich strain. Jack the Ripper is known to have a lot of THCV, as are some exotic African strains.