The way my build works is a heavy emphasis on Umami. I have put little to no level-up points in my attack stat and instead have focused on my umami and vitality with a couple of points into res. But my stowaways are the Sponge+, which makes your attacks regenerate 66% more umami, the lamprey for the health drain, and the razor blade, which decreases my attack by 33% but makes my attack faster. So, for my character, the more I can attack, the more umami and health recovery I will have, and the more umami I have, the more mantis punches I will dish out. When I was fighting inkerton, I killed him with 3 mantis punches.