Nate is probably the 'safer' play this week and he's got a great match up, but I could envision a few scenarios in which Helu has a solid game:
A. Torain suffers an injury during the game and Helu gets all the carries
B. The Skins fall behind early and need to pass. In this scenario, Helu will be on the field for more snaps
C. Torain comes out and sucks against one of the league's worst run D's and Shanny gives carries to Helu
D. Helu simply makes the most of limited touches and a fantastic match up with a ridiculous yards per touch average.
While all of these seem unlikely, they aren't necessarily impossible. Add onto that the rumors that TEN is going to give Chris Johnson a heavy work load this week to get him back on track, and the fact that Nate hasn't looked crisp in the #1 WR role, and you could make an intriguing case for Helu, but he is super risky. If you can afford the risk, then I think it's worth a shot, but if not then Nate seems to be a safer play ––– you just have to hope he finds the end zone for you, and his chances are good given the targets he's going to get in a softer match up than last week.