There are a few players that have figured out "the magical stat combo" that allows them both on attack or defense to score every hit on you until you're ko'd while evading every single shot you take on them. i reskilled to pure duel stats and i even take out top duelers in their duel gear with some return damage of course but the very few, three that i've found now, have found this magical stat combo. Both head shot and arm shot strategy have been used. The challenge is now gone. As soon as a player figures out this stat combo it's literally like shooting fish in a barrel.