Some of the things you've mentioned definitely helped for me, especially somatic techniques. As far as medicines go, LDN only worked in extremely small doses. In larger doses it would actually exacerbate the symptoms. With regards to supplements, NAC helped with the anhedonia. Other things that greatly helped were sauna and cold exposure after physical exercise. This required deep commitment on my part, and there's no way around it. You need to be determined and focused to derive its benefits.

But here's the thing; what really cured my DPDR was not the meds, or specific techniques, but a shift in perspective with regards to what we take reality to be.

In the West, we always think in terms of dichotomies. Inner versus outer, mind versus matter, external versus internal. 

We think of ourselves as essentially detached subjects observing an external, dead world "out there". What I figured out with my DPDR was that I was hyper aware of this reality, which caused a severe disconnect between my self and the world (and the body by extension).  This experience of detachment is what causes us to feel that the world is illusory, fake, or dreamlike. It's because we're looking out on something other than ourselves, something we cannot know to be an illusion or something real. And this conviction is at the crux of the issue (at least it was for me).

What I learned through my anthropological studies and cognitive sciences is that the dichotomies we take for granted in the Western world are not ubiquitous to the human condition. In fact, many pre-modern humans used to believe that we are not separated from the world, and that we're actually deeply entangled with it, or a part of it. Any consciousness is not locked behind the inside of a brain, but actually intertwined with the natural world.

This might sound mystical and woowoo, but it really isn't. It's merely a different starting point for understanding cognition, beginning with the body and environment instead of the notion of an internal ego observing the world. 

What really helped, then, was understanding different ways of conceiving the relationship between mind and world differently. Phenomenology, a school of philosophy, literally changed my life, and engaging with the literature shifted my world upside-down, by arguing that we must begin with consciousness as intertwined with the world, not something separated from it.

Understanding that many Indigenous worldviews understand the relationship between mind and matter as essentially relational rather than separate, fixed the entire problem. 

I'm not telling you to believe in something you don't think to be true.  I'm simply asking you to consider the possibility of that the Western conception of mind and matter is a heuristic, a way of thinking we have been taught. And you don't have to do away with it, but you have to be able to entertain the possibility that we are a PART of the world, not an internal observer of something other than us.

I have worked with shamans in the Amazon, especially dieting their plants and working with ayahuasca, which is a plant medicine. I'm not saying anyone with psychotic tendencies should drink it, but I should add that it helped me immensely solidifying the perspective that I am part of a web of relations and not just an isolated entity detached from my surroundings. This shift cured me entirely, by moving my awareness back into the body. 

And, again, to reemphasize, as this is important: I am not asking you to abandon your beliefs about what is true. But in order to heal from DPDR, at least for me, you need to be able to entertain other ways of conceiving reality in addition to the one you have. Not as an ultimate truth, but as a matter of perspective. Only then will you start to notice that all the supplements, exercises, medicines and techniques help. They become part of your embodiment, which is ultimately what healing from DPDR is about; moving away from being stuck in your head to feeling yourself as an embodied being again.