Vakama would win, he would just go invisible and then shrink MC to the size of a thimble with a disk.
MC: "Ha! fear my plasma sword! I shall... oh no, I'm itty bitty, oh well, I prick your toe! Hop around in pain while I run away!"
Vakama: "Ow ow ow! Toe toe toe!" CRUNCH! "Ewww, now he's all over my foot!"