Standard Leage Flex - Darkwa, ASJ, or Morris?

So here’s the deal: I have Engram at my TE1, who I’m obviously starting, and have my RB1/2 spots locked in. My flex is up in the air. If you could only have one, which one would you flex?

  • Darkwa (decent talent, great matchup)
  • ASJ (consistent, great matchup, but not a very high ceiling)
  • Morris (kind of a wild card, won’t put up near Zeke numbers and could take a backseat to McFadden?)