Assuming Kittel dominates the early sprints then goes home I'd go for a GC contender winning points jersey.
It may have been carefully weighted to keep pure sprinters in the game? Sprinters that are good at maths...
Red: the points competition.
Category A+B stages (2 – 3 – 4 – 7 – 10 – 13 – 17 – 21) offer points for the first 20 riders at the finish: 50, 40, 34, 28, 25, 22, 20, 18, 16, 14, 12, 10, 8, 7, 6, 5, 4, 3, 2, 1. For the TV there are points for the first 10: 20, 16, 12, 9, 7, 6, 4, 3, 2, 1.
Category C stages: (5 – 6 – 9 – 11) offer points for the first 15: 25, 22, 20, 18, 16, 14, 12, 10, 8, 6, 5, 4, 3, 2, 1. For the TV there are points for the first five: 10, 6, 3, 2, 1
Category D + E stages: (1 – 8 – 12 – 14 – 15 – 16 – 18 – 19 – 20) offer points for the first 10: 15, 12, 9, 7, 6, 5, 4, 3, 2, 1. For the TV there are points for the first three: 8, 4, 1
It may have been carefully weighted to keep pure sprinters in the game? Sprinters that are good at maths...