User blog comment:AtheistUntoDeath/Which of these Champions would win? Part 5/@comment-12314620-20140530221949

I would start thinking this matchup by analyzing the nature of master Yi:s wuju style.

From what we know it seems like wuju is zen-like form of martial art (even a way of life maybe?) where the user aims for total mental clarity free of any distractions. This allows Master Yi to act and react at inhuman speed, shrug off physical wounds simply by strengthening his focus, strengthen his own blade and even to a degree ignore the "physical laws" by seemingly striking several times with a single swing as well as striking several opponents at a time. Considering his joke "Key to immortality? Not dying" might imply that his beta lore, which states he's 1000 years old (long time to master his art) could also still be valid though this is only speculation.

Also from Wukongs lore we may further deduce that wuju isn't limited to blade. It seems more likely that through rigorous training and meditation the practitioner is able to use practically any weapon at masterful level naturally as an extension of his body.

It's also stated in Yi:s lore that he practically singlehandedly turned the tide of the battles he took part in when fighting against Noxian invasion, where as Yasuos success in war was never announced and only thing mentioned in his lore that it was foolish of him to think that he alone could change the tide of the battle.

Yasuos mastery of his blade is remarkable which should go unquestioned and he has a clear advantage in having his wind techniques. However I feel that Yi with mastery of not only his blade but his body and mind as well would emerge victorious in this matchup. I also feel that Yasuos past as well as his emotions ("Can't die before killer faces justice") might prove to be disadvantage against likes of Yi who have practically gone through similiar state of mind (wanting to take revenge on Noxus) and come to the conclusion that those feelings prevented him from mastering his technique.