I think it owuld be a bit too much for Nami and Usopp… Would be perfect for Sanji and Zoro.
I bet the fake crew are just pussies and just living because everyone is afraid of Luffy and Co.
Fake crew is definately fodder.
I don't think that those bounties are too much for Usopp and Nami. Hopefully now with all their powerup's they can defeat them, unless they have some crazy DF's.