How hard are these climbs compared with, say, Poggio, or that one Cav got over for the TDF stage to Aubenas last year? On his day he is as capable as any of the other sprinters at getting over the climbs but are these ones really selective enough to whittle it down to the Ardennes types like Gilbert, Cunego etc?
Its bad news for Cav that he's only got two teammates but the good news it that GB has a number of guys who are suitable for the job. Millar is probably as good a domestique as you could find in the world these days and adding someone who can also climb a little bit like Thomas would be the best Cavendish can hope for. He doesn't need a train per se but any two of Millar, Thomas, Hunt and Hammond are experienced and quick enough to handle themselves in the last couple of km provided they can get there.