Well yeah, they do (although I think the Kat armors and Chroma Suit armor line fit better). But those are unique in their own ways, it's just that I feel these could be a cool new costume set if they were made, but that's just me.
As for the blade thing, sorry if it has been suggested before (I didn't find anything so I thought it hadn't been suggested), it's just that I wanted to suggest them as a whole and share my ideas, like as a set suggestion.
the shadow line gunner armors will work fine for assassin things
and their saw blade was already suggested somewhere else