All Blanco have to do though is just hope Gesink can stick with the sky Train. Kelderman, Garate and Kruisjwijk should be enough help for the mountains. Also they do not want to lose time to Sky and probably Astana in the TTT and need to protect Gesink on the flats, so he does not crash- like in basically every other GT.
Sky can use G, EBH, presumably one of the Colombians, Xandio, Porte and Wiggins, to ride in support of Froome. Knees I would also say would ride.
That leaves one more, of whom they can select a dearth of other riders.