Flex pick - play-off Semi

What’s up guys. Feel like I have a lot of choice at the flex tonight, potentially need to change my WR picks to accommodate. 0.5PPR

Currently, i’m choosing between McKinnon (CIN), Williams (@ WAS) and Crabtree (DAL). I’m leaning Crabtree, but considering sitting Adams (@ CAR) from WR2, moving Crabtree there and flexing Wiliams as a safe volume play. What do you think?

I’d say i’m a slight underdog against a Rodgers, Nelson and Hopkins owner - if that makes any difference.

My line-up currently: Stafford, Gurley, Hyde, Thielen, Adams, Graham, Crabtree, Boswell (K), Eagles D/ST

Keep Adams in and flex Williams.