Who to target with #1 priority?

I scored the most points in my league week 1 and the least points week 2, now i’m nervous about specifically my RBs. With a WR heavy waiver week and nothing exciting at RB I have a lot of uncertainty this week. We are in a priority waiver system, full point PPR with a Flex.

I was thinking of picking up Frank Gore or Chris Thomson then putting in for Nelson and Higgins and dropping Ginn and Powell.

Any suggestions and thoughts would help a lot!!!