In my mind the ratio behind switching the order (starting first with the soft contrast filter with higher contrast negatives, but reversing the order with lower contrast negatives) is that the trickiest and most demanding part of the print is getting the contrast and detail right in the part of the range that is most difficult to reproduce accurately - the detailed highlights in the contrasty negative, and the textured shadows in the low contrast negative.

If you get the toughest stuff right, the rest comes relatively easily.