Help me choose my flex and wr spots please!?

Obviously Jackson, he has definately been amazing, and for the second i'd have to definately go with Sims-Walker, he definately played amazing, i wasa lucky enough to get him in FA, maybe u should check FA for a bttr WR, your back-ups arent great, maybe Johnny knox if he is ther, i got him in FA too, but if he isnt ther i would start Burleson, but i am not guarenteeing anything, he could have a good game, but check FA b4 u start any1 in the flex, do u have any RBs u could start ther? u dont have great back-up recievers, i hope this helps