Damien Williams, Samaje Perine or stay put?

I’m a Mixon owner and I’m debating if I should use a high waiver (3rd) on D. Williams or Samaje Perine…or stay put, save it and hope that Miles Sanders will be a serviceable fill-in until Mixon returns? Considering I’m ok at other positions.

12 Team PPR:
QB: Jalen Hurts
WR: Keenan Allen
WR: Cooper Kupp
RB: Dalvin Cook
RB: Joe Mixon
TE: Mark Andrews
FL: Miles Sanders
K : Matt Gay
D : Denver Broncos
BN: Kirk Cousins
BN: Jakobi Meyers
BN: Javonte Williams
BN: Tyler Higbee
BN: Alexander Mattison
BN: Jerry Jeudy (No IR)

Might not hurt you to at least pick up Perine