I might be able to? But I'm not sure yet?
To defeat him, what I have found best (works just about everytime), you need lots of dynamite, a fire stick (use the Dreamweaver to find the plans in NML if you haven't found it already), a can or 2 of oil, and a fog extinguisher, oh and a full aether meter. Make sure you are always on fire when in battle. And it's best to take out the other two automatons first before the yeti, at least that's what I do. Again always stay on fire