I think that's probably a bit too much, but if you're in a 2WR league, right now I'd probably rather have Booker on my roster considering you're not going to start Robinson over Julio or Cooks. Booker should be a very good flex option and at least in the short term, he's an upgrade over Robinson in that role. It's super risky because Robinson could turn it around and C.J. could be back for the fantasy playoffs, but I think with your roster, it might be worth the gamble.