Aww, man...I know exactly what you're talking about. I've never actually read all that summed up like that while reading on FM, but it all (crappily) resonates.
I noticed that you take Magnesium. As I understand it, there's a few select forms (nutrient combinations) of it that the body actually manages to absorb well enough for useful supplementation.
About 5 or 6 months ago, I started taking Magnesium Malate after reading the reviews on Amazon
here, and I do think it's actually helped reduce the amount and severity of my flare-ups. Mine are really dependent on my hormonal cycle. I have a few flare-ups a month, and the worse happens right before, during, and after menstruation. It's still very uncomfortable during that actual window of menstruation, but it's not quite as oppressive. It's worth it. Then the instances of flare-ups not around the time of menstruating have seemed to just lessen, and when they do happen, they're over faster.
Malate comes from malic acid, of which green apples are a huge source. It's what lends the tartness. One of the things that piqued my interest about Magnesium Malate for FM is that often times green apples would definitely hit the spot for me, in a hearty way, not a "my taste buds want it" alone thing, although that too.