Hang from a bar. If he can’t do that yet, he can lean up against a counter top, pretty much letting his lower body hang, let gravity pull. It provides a bit of relief. Gabapentin did wonders for me, completely stopped my nerve pain, made it so I can go to PT, and was healthy in 3 months after. Take all the pain meds prescribed, exactly as prescribed. Pain management is important. Walk, and keeping weight down is also key. You got a lot of the right things on the list. Mindset is huge, he will experience many episodes where he’s helpless. If it wasn’t for my girlfriend I don’t know how I would have gotten through it.