I know that RG has said the tea helps by binding the toxins and carrying them out of the body, hence helping to reduce die-off symptoms. The Humacleanse can only help to keep things moving through/out, as well as clean the gut. I am doing all three together, too.
As I am only a beginner (and shall do my level best to remember this for the remainder of my days ;), I cannot respond to any of your other questions.