I want to know, statistically, ignoring their abilities, who's the most likely to win.
My bet's on Junko, she seems to have by far the most optimal loadout. Sagume and clownpiece are both overly focused on offense. Heca's heavy apparel is more specialized for formation fighting, which lowers her odds in a 1v1. (This is perhaps in line with her ability to have 3 bodies, but even then there's still the obvious debuff of being fucking blind.