Need roster advice!

I am 0-4 and my WRs are garbage to say the least. I had running back depth but with the Mixon injury I am thin. I want to make some trades to upgrade my WR depth but not sure who to deal. Do I stick with my current roster and hope it pans out or start shopping Henderson/Waller? Trying to get Schultz off of waivers to use as trade bait to TE needy team or possibly a replacement for Waller if i deal him for a top tier WR. Thoughts? Thanks! PPR league.