I'd go with Welker / Nelson until 1) AJ proves he's back to being AJ and 2) Decker proves the preseason love affair with Peyton is more than a preseason week 3 fling. Of the four WRs I mentioned, I probably rate Johnson the lowest since even his best seasons aren't all that great when you compare them to the ceilings of the other 3. He's in decline.
12 Team ( .25 PPR / PPC, All TDs 6 pts, 10 rush / rec = 1, 25 pass = 1) (QB, 2 RB, 2 WR, 1 RB/WR, TE, DST, K)
QB Brees, Luck, Wilson
RB F. Jackson, D. Martin, Tate, Gerhart
WR Lloyd, Decker, Garcon, Moore, Cobb
TE Finley, Rudolph
Matchup DST / K