Superflex trade?

Superflex 10 team ppr - redraft

QB: Brady, Bridgewater, Tua
RB: Mixon, CEH, Javonte, Eli Mithcell, Perine
WR: Lamb, Terry, Diontate, Higgins, Arob
TE: Pitts and Gronk

Should I give away Arob for Ryan Tannelhill?
OR
Should I give away Higgins for Lance?

**I am 0-4, need a win, Lance does a bye next week anyways.