Combat ala HackMaster Basic

[Exeter]

You could give everyone an automatic Dodge when hit, adding penalties for the second and further hits in a round (say -2 per hit beyond the first hit). Assuming reasonable levels of Dodge, this seems like it'd work sort of like True20/Mutants and Masterminds' "damage save" mechanic, and it's definitely an opposed-roll type of mechanic in spirit, even if not in name.