I don't see any reason why you cannot begin to chelate the mercury with DMSA or DMPS. If anything, i can't see them causing harm regarding the copper. They just grab hold of either lead or mercury.

It might even help you, as you find ways of stimulating your bile at the sametime. Certainly, you're probably stirring up something when you try and increase the bile and maybe the chelating agents will be able to grab hold of what metals are being stirred up and help to excrete them out.

I'm no expert, but sometimes you have to try things and see what suits you. You can't always go by the book in every case. Lessening some mercury at least might provide just enough relief to increase your bile more.

just some thoughts.