yeah i was thinking your avatars outfit works good for the third. as for sasori i thought the face somewhat suits him good too. but if anything, just give ur already made portrait the eyes. i also think the hair of sasori's portrait need a little editing. sasori had really messy hair.
the eyes u should of used for sasori is the same like your avatar's. it has that emotionless feel to it. the sasori port looks too happy. but changing the eyes means the whole face too. i actually think that, that avatar you are using is a good sasori base.
the eyes are more fft-like. the shape of the face is another thing... it looks like ur using that baby's portrait as the head base and it isn't really working for me lol... there's a couple portraits out there that is using that pose out there that i can't think of at the moment.