Woodsman67

These two strains are said to be good for muscle spasms. https://bakedbeans-cannabis-seeds.com/product-tag/muscle-spasms/ I cannot verify that as i am not familiar with either of them.

I see you've tried Afghan Kush that too was my first impression. You might try this strain https://en.seedfinder.eu/strain-info/Purple_Maze_Kush/New420Guy_Seeds/ It brings together two afghan strains. Supposed to be very hard hitting even as a help for PTSD. Only available as regular seeds though. I grew 2 of 3 seeds this last year, but both only yielded very healthy, and vigorous males. I have a tenant with MS who uses concentrates. Have you tried that route? Good luck.