imo, Kid and Teach 2v1 Saint Shanks. Kid creates a super powerful magnet using assign, preventing Saint Shanks from using his sword effectively.
Then Teach fights Saint Shanks while Luffy fights the Kid pirates(all given DFs by Teach). Luffy beats the entire Kid pirates, Kid included, but Kid’s actions allowed Teach to deal severe damage to Saint Shanks. Ultimately leading to his death or defeat.