Your arrangement of the confidence in different disciplines is interesting. My one change might be the moving up of Metaphysics and Philosophy up above the historical 'sciences'. Philosophy relies a lot on logic and the concept of non-self contradiction which establishes some discipline on its practitioners. The historical sciences seem to put no constraints at all on the authors since there is such a great volume of 'evidence' from which to sift and select almost any conclusions the author wishes to make.
Indeed, betty boop observed the overarching nature of the "first" and the "last" categories on my list. I agree with her analysis.