My guess is that we will, in a ideal season, see Canada as the track where the second set of components get inserted into the pool, and Monza as the last track where a new set of components gets inserted.
So in theory:
Component Set #1: AUS, BAH, CHI, AZB, ESP, MCO (Fridays until and including Singapore) - 6 GP
Component Set #2: CAN, FRA, AUS, GBR, GER, HUN, BEL, SIN (Fridays from RUS till MEX) - 8 GP
Component Set #3: ITA, RUS, JPN, USA, MEX, BRA, ABD (Fridays in Brazil & ABD) - 7 GP
However, i do see every driver falling fowl of penalties this year. Even Mercedes will suffer. Ill go as far as to say that some teams will take a tactical penalty or two in order to have an extra component in their pools. And by tactical, i mean at a track that their car isn't working as well as they would like to.
Component battles in the engine departments of manufacturers and teams will be a big story this year i think.