A breakaway is your best bet. Put all your riders in the first breakaway. The more riders with over 70 in hill/mountain ability, the better. Rely on the other riders in the breakaway to take leads the first half of the stage, then use your own riders in the remainder. Usually you will have such a large gap to the peleton by the time the favorites begin attacking, you can win with riders with only 70 to 75 mountain ability. If you have weaker riders, choose your strongest rider as a complete captain. Make the rest of the team work all day long without him doing anything until the last 20 km.