My plan of attack is Backrest, Seat Mod, Handlebar Risers.

I am 6'4" so the reach for the stock bars isn't terrible. I want to change one piece at a time until i find what is comfortable.

I am getting ROCKING head buffeting from the stock roadster screen (It was free as part of a marketing deal from triumph) but I can handle that if I can get the back pain under control. The pain is mostly in lower back and between shoulder blades.