I think DMPS can remove mercury faster than the other stuff. But a lot of folks can't get it prescribed to them. I live in CT, and it's actually illegal here!
That Cutler protocal of ALA, DMSA and 1 more......forgot the other...sorry, but seems to be the safest, taken every 3 or 4 hours, for a few days, then break, then again. The 3 or 4 hours, even through the night prevents the mercury from redistributing which can be extremely dangerous.. keeps it moving out the body. I'm no expert, but that's what I've gathered so far.
I have some work to be done in my mouth, so I'm not at the point to do anything yet. After a few thousand $$$$, I'll be ready to do this!