Here is my thinking or potential Box on some weeks....mind you Tua had 350/3TD, Parker and Gesicki can't get all of it plus as the better receivers they are likely to draw coverage and we've already seen Tua has no issue checking off and going to his 2nd and 3rd Read if need be.
Parker's targets fluctuate if you look them up on a game by game basis, last week was 7 so expect like 4 this week. Jokes aside, he is around 8 targets a week. I think another WR can easily slide into 5-7 targets a week and yet a 3rd or slot WR also grabbing around 4-5 and that would be around 20 targets to the WR and I think that volume could increase some weeks. Remember, Miami currently has a pretty pedestrian run game so Tua is going to have to air it out a lot for now.
Parker 6/70
Callaway 4-50/TD
Grant 3/40
And I can mix n match this many different ways, Parker can disappear some weeks or for whatever reason he seems to draw DPI often and yeah it's a great thing as a Phinsfan but lousy for FF. Maybe that week it's Grant 3/60/TD, Callaway 5/70 and Parker has his once a month dud for like 3/36.
Parker will be the lead, there's no doubt in my mind but someone from the other group is going to be thrust into a bigger role than most are thinking abut right now. Schedule is too soft for Miami not to feast the next few weeks.
In most of my leagues I don't honestly think anyone will grab Callaway tonight so you can likely grab other needs and think about it before the weekend. Redraft leagues I'm talking about.