Fun little WR2, TE and Flex question all in one!

[Dank the Tank]

Long story short, I have 5 guys that I must pick 3 out of, one for my WR2, one for TE, and one for Flex (RB/WR/TE)

Larry Fitz v SF
Steve Smith v Chi
Jeremy Kerley v Mia
Heath Miller v Was
Antonio Gates v Cle

real tough decision for me. Curious to see what you guys think. I initially had Fitz, Kerley, and Miller in. Then changed to Fitz, Miller, and Gates. THEN i thought Kerley, Miller, and Gates (i'm not too crazy about Smith's matchup, as you can tell).