I can tell you what I generally recommend for our PTSD patients if that will help? Depending on what strains we have in stock at the time, we generally suggest strains that are at least 80% indica. Some favorites around here with our patients are: Granddaddy Purple, Northern Lights, Blackberry Kush, and Blueberry Triple OG. The Granddaddy Purp is super popular when we have it, and it's a heavy duty one. I personally like the Blueberry Triple OG we've got in right now, because though it's definitely a pretty decent high, the come down is gentle as hell, and doesn't make me feel groggy, but is super relaxing.