but can't figure out a systemic way to figure out the right dose for me, other than trial and error random doses.
Yes, I think trial and error is about it for practical options. It takes time and multiple trials, since there are so many other random factors affecting our ME each day. LDN made a big improvement in my quality of life (chronic pain really sucks), and since I lost the neuropathic pain after a year or two on LDN, maybe it was responsible for curing it. I expect that it won't work for everyone, but there are probably people who could benefit from it
at the right dosage for them.
The things I learned from trial and error with LDN, that might benefit others:
It is a fairly narrow band for effective dosage, so do experiment with what's optimum for you.
Taking it sublingually requires ~30% lower dosage.
For me, each dose lasted less than 48 hrs, but more than 36, so I was able to alternate morning and evening doses every second day. I didn't notice any differences in effectiveness at different times of day, but that might be an issue for others. I prefer minimizing my pharmaceutical intake.
I didn't have any problem starting with the standard 4.5 mg dosage, but others reported needing to ramp up slowly from very small doses.
I noticed full effects the day after the first dose. I went for a hike, and discovered that the crippling muscle aches were simply gone.
LDN didn't affect any of my other ME symptoms. I think it has different effects for other people.