Start/Sit Decisions: Rb and WR

Got some rough start/sit questions this week because all of them are good options.
Rb: Sony Michel or Tarik Cohen
Wr: Keenan Allen, Tyler Boyd, or Brandin Cooks

Can only pick one for each category.

Any and all opinions are welcome, the only reason Wr is a question is because Allen is starting to annoy me and Boyd has consistently been on my bench outscoring him, and my other Wr slots are already locked in with Thielen and Mike Thomas.