2 part question

My roster currently is
Qb cousins, mariota
Rb gordan, kamara, freeman, coleman, drake
Wr baldwin, shepard, juju, funchess
Te clay, asj
K lutz
Def jacksonville

Question 1 should i start juju or shepard this weekend.

Question 2 shoulf i trade away a rb is i can get wentz in return because if wentz’s playoff schedule and just as an improvement to my roster or should i hold my rb depth.