How many Heisman contenders get to go to New York? Marvin Harrison, Jr. is getting some push within sports media. He's probably a shoe-in for the Biletnikoff, although his numbers don't match either of LSU's two main WRs. But the Biletnikoff usually doesn't go to the WR with the most receiving yards, TDs, etc.
Daniels is currently the odds-on favorite for the Heisman, but the odds are subject to change every weekend, and I see three problems Daniels has. First, he only has one more game to play, and nobody will be watching it. A&M @ LSU will take place at the same time as Ohio State @ Michigan, and whatever Daniels does, nobody will see it, as everyone will be watching "The Game." Next, Penix and Nix will likely be playing in the PAC12 CG while Daniels and LSU sit at home. They'll not only get to run their passing numbers potentially past Daniels, but also they'll have a lot of voters' undivided attention, giving them more chances for "Heisman moments." And voters are notorious for "what have you done for me lately," i.e., whoever is the last awesome performance they saw sticks in their mind the most and sways the votes big time. Finally, those first two factors will be combined with LSU having 3 losses (assuming LSU doesn't lose to A&M), and many voters do not like voting for candidates on teams who aren't in contention for anything.
If LSU loses to A&M, Daniels won't even get an invite even if he goes off for 700 yards all by himself. If LSU remains a 3 loss team, I suspect the current sentiment will shift back to Nix as Daniels is basically done impressing the voters, while the other candidates are going to have a couple more chances on big stages. Probably, Nix at least needs to have a bad game against Oregon State or Washington in the PAC12 CG.