So as I was examining the premises of both systems, I noticed that the Roman Catholic system is primarily based on an appeal to history and traditions as well as biblical arguments. It cannot argue on the basis of the bible alone, in the same way Reformed Theology cannot argue on the basis of tradition alone.
BUT the only way either group can argue, is by crossing over to the other's territory. So the only way Reformed Protestants will be able to grab Roman Catholic attention is by citing St. Augustine's doctrine on predestination perhaps, or the Council of Orange. Likewise, the only way Roman Catholics will ever get Reformed folks attention is by arguing about things like Federal Vision hermeneutics, Scott Hahn's arguments from scripture, and perhaps old issues like the biblical case for infusion rather than imputation.
I was making a list of prospective fights that could occur and this is what I've got so far (let me know if I'm missing a good one):
-supremacy of love / not sola fide / theological virtues
-obedience of faith / transformational righteousness/ infusion
-loss of justification/salvation?