Help do I use waiver priority

I am 3-1 12 man half point ppr
I have fournette and Howard and duke johnson, have to roster 2 RB and flex

I have number two priority in waiver this week, should I use it or wait. It is likely number one waiver will be with me this week.

I currently was going to grab l murry or A jones, but are these guys worth it considering I will be able to pick anyone next week and following week