User blog comment:Blademaster00/Official Amatsumagatsuchi Talk Page/@comment-2040723-20101210020014/@comment-2040723-20101213163610

It looks like the list I put up here is incomplete; there still could be a bunch of stuff that isn't shown. BTW, the weapons may have low Affinity and Sharpness, but the skills on Amatsu's armor are tailor-made to cancel that out (Sharpness+1 to increase sharpness, Determination+2 to compensate for low Affinity, and Water Element+1 to boost thier elemental power). It's like they were deliberately made to be used together.