If you are talking about your level 61 WR, I would split between SPD and AGI. AGI determines how quickly the WR can get to max SPD. It also increases how fast the WR can go in an d out of cuts. thus allowing your guy to get open more often. Max SPD will allow your guy to streak extremely well and get open deep. If you have a deep throwing team go all SPD. If you have a balanced offense, split between the 2. Your decline will be coming up and eventually your AGI will be too low for your SPD to do any damage other than streak.