going off topic a bit, but specifically in this year's race, I see four individual favorites and one team with plenty of power but no clear leader.
Froome is top favorite, Nibali will depend on the vuelta and
a good classic rider will also be a threat, Cancellara and Sagan. Colombia has plenty of options, but will have to control the race, same with Spain.
Now, you cannot beat Froome and/or Nibali is you wait for a final attack. I know Nairo, Carlos and Sergio have that last 2km punch, but Froome and Nibali have it as well. You also cannot let Sagan or Cancellara attack from far.
What is Colombia to do? my take is do what they do in the Vuelta a Colombia & Clasico RCN races in Colombia...attack like crazy. In those races, there is 5, 6 sometimes 7 chase groups. Very small peloton. With no radios allowed in the worlds, it will be a perfect strategy. Duarte & atapuma can be on the break. I hope they pick Acevedo, he has shown a lot of potential on his own with no team. He can also be on the break. Force Spain, Italy, etc... to chase those guys down. Switzerland and Slovania will hopefully lose guys (and Great Britain too). When it gets to the last climb, attack after attack is the only way to beat Froome & Nibali. Send Carlos first, ride wheels. If they catch him, Sergio attacks. Two huge threats, others HAVE to chase. Save Rigo for 2km out attacks, Nairo for 1km attacks. Nairo doesn't have to win, he can be the smoking gun here.
What is really a shame is that there is a better chance for a Colombian to have the World champion jersey at a WT event than a Colombian having the national champion jersey at a WT event, but that's a different discussion