Harty.
He should stay in Landry's hip pocket all throughout camp. If he continues to develop the nuances of route running, I could see a scenario where he winds up taking a big portion of Landry's expected snaps in the slot. He's electric when the ball is in his hands, and he catches the ball well enough.
If/when Kamara gets suspended, I'd like to see Harty on more motion sweeps/end arounds to help put more pressure on the 2nd level of run defenses, and make things a little easier for the backup RBs. It seemed like we didn't use that element of Harty's game as often last year. Sprinkle a little bit Taysom running the counter with a head of steam off the fake and we could still see some big runs without Kamara.