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The Raid Dolomite route would be my suggestion, from memory;
Day 1: Thonon-les-Bains -> Sion
Day 2: Sion -> Domodossala
Day 3: Domodossala -> Bellinzona
Day 4: Bellinzona -> Chiavenna
Day 5: Chiavenna -> Bormio
Day 6: Bormio -> Merano
Day 7: Merano -> Val Gardena
Day 8: Val Gardena -> Cortina d'Ampezzo
Day 9: Cortina d'Ampezzo -> Vigo di Cadore
Day 10: Vigo di Cadore -> Udine
Day 11: Udine -> TriesteThat's approx 100 kms a day, but on average the climbing ranged between 3000-4500 metres a day.
From where to where?