The 50 drops initial dose would be hard to tolerate, and given you had more Amalgams than me to begin with your mercury toxicity will be much higher also, so you should definitely start with low doses and increase slowly as your tolerance develops. I started with 25 drops, you would probably be best with 15 to 20 drops or less, see how it feels and increase slowly over time, and the extra supplements definitely should be considered so support the process.
I see advice from others regarding ALA and HMD, I appreciate the advice and am already aware of the theory and Science behind it all, I can only go with my own instincts and I now have some personal experience to work with. I would say ALA is the number one approach I have no arguments with that, its just not one I am seriously considering right now. My experience so far has been positive, but everyone should educate themselves and make their own mind up.