You've tried everything my friend. Like myself, nothing seems to be working.
The only other route you can go are experimentals. RU and/or sulfa/seti. There is nothing else you can do.
I would stick with dutasteride if you have access to it and didn't have side effects. Perhaps there may be some new hair growth, or reduction in shedding after the eight month point. Who really knows?
In addition to that, you could attempt some supplements to assist with battling the inflammation. Also, try perhaps getting some minoxidil with azelaic acid - may help battle the 5-ar in scalp.
I don't know man. I am struggling with this myself. It's f*cking torture. Everyday it just gets worst no matter what I do.