Xena's feats to be used as depicted by her throughout the entire TV series.
Edward Cullen's feats to be used as depicted by him throughout the movies.
Fight takes place on a sparse grassland with mountains and rocks lying around.
Both start 100 feet apart from each other.
Winner via KO/incapacitation.
No BFR, retreating from the battle "to fight another day" counts as a loss on the retreating side's part.
Remember to use logic as well. Just because you rely on feats for determining who wins doesn't mean you ignore logic. If we rely on feats alone, then we may as well say that Goku has better feats than The Living Tribunal (Its true), and therefore Goku wins.