"Winning with exposure" in this refers to exposure of skin of female champions, and Ashe is basically saying that since Sejuani can't win (seduce people) without clothing, her strategy is covering herself up completely with clothes.
Because she can't win with exposure, Sejuani offers differentiation by covering herself up completely!ScrunchJust shut upWhat, are you trying to do it again this year? Little kid...? Whyo?Scrunch Differentiation of StrategiesAh, that's...