Prior to discovering this forum and a lot of the other interesting schools of thought (or approaches), I had spent a good chunk of time focusing on allo, and I think there is still something to it. My experience was and is very much like yours. I had a very stressful year or two, that brought on all of my issues with PFS, and a near PTSD type state. See below.
https://hackstasis.com/threads/why-did-i-feel-so-good-on-finasteride.462/#post-9509
I have also become convinced by this forum that there are several types of flavors of PFS, and that not too many people have had my experience. It sounds like you have, and I would be really interested to see what your hair test says about your metabolism. Please let me know if you go ahead with it.
That aside, the biggest early success I had was through phosphatidylserine supplementation. It connects to some of the sardine discussion here. See below:
https://hackstasis.com/threads/phosphatidylserine-phosphatidylcholine.245/#post-9394
I can find some of the research later, but in short and simplified, PS (and through it IMO allo) is useful for maintaining nervous system health, and lower levels are associated with cases of demylination. At one point I had tried a 5α-DHP supplement (precursor to allo), and while it had some interesting and calming effects, it didn't seem to impact sensitivity or libido. I have since come to agree with this forum that exogenous supplementation of this type is probably not helpful long term.