okay so if they're oiled up then outis has a distinct advantage. the only person who could possibly contest outis in OILED SINGLE COMBAT is dias, however dias would not be participating on her own. dias would pretend to lose early on into the battle royale but secretly have lots of stake in the background politics of the battle royale, thus losing the battle yet winning the war. also moses would quit immediately as soon as she saw dias was here.
iori is a color and can also dimension jump which should honestly be considered cheating. if there is no oil, then iori has to win simply by sheer power scaling. nikolai would take too long to be able to use Disposal especially with oil applied, so even though she's the most jacked person in the old woman battle royale she would not win despite best efforts. therefore my highly scientific answers are "if they are not oiled up, it must be iori based on strength. however, if they are oiled up, outis's Ancient Greek advantage and youthful vigor (as most likely the youngest participant of the old woman battle royale) would likely allow her to win against the odds." thank you