I've recently encountered an Orochi that can two-shot me. I play as a Kensei and was two-shorted by my friend showing me a cool trick that Orochi can do. He combined the two feats, "Fear Itself" and "Sharpened Blade" and was able to two-shot me with two heavy attacks. I was also told that a Warden could one shot, but I don't know if it's just a rumor or if it is true, I don't know how. I don't know if anybody has reported this before.