I'm leaning toward the same Idea, limiting my type set to 100 cards, but having a hard time arriving at my list of 100
One thing I noticed about your list is ; you have cards with very similar (or identical) fronts and different backs - 1914 and 15 CJ's for example, but you haven't included the myriad of possible backs associated with M101-4 and 5 and other similar Mendelsohn's
Unfortunately I won't be much help in unraveling the intricacies, as I still find it a tad corn-fusing, but I just want to point them out to you for your viewing pleasure. (If you haven't noticed them already).