Off the top of my head, add alpha-lipoic acid [thioctic acid], silymarin, and selenium as well to the milk thistle.
One drawback to alpha lipoic acid is that it is also an iron chelator. Removing excess iron is great for people with excess iron but bad for those with certain forms of anemia.
I stick primarily to the herbs such as phyllanthus, picrorrhiza, schisandra, poke (small doses), licorice root, etc.