Need travel to:
Mission 1: Thais and Venore
Mission 2: Venore (Black Knight Village)
Mission 3: Port Hope
Mission 4: Ab'dendriel (Hellgate)
Mission 5: Svargrond (Barbariam Camp)
Mission 6: Svargrond
Mission 7: Kazordoon
Need travel to:
Mission 1: Venore and Thais
Mission 2: Thais
Mission 3: Carlin
Mission 4: Venore (Black Knight Village)
Mission 5: Carlin (Isle of Kings)
Mission 6: Svargrond (Barbariam Camp)
Mission 7: Kazordoon
Need travel to:
Mission 1: Carlin and Edron
Mission 2: Venore (Black Knight Village)
Mission 3: Venore
Mission 4: Venore
Mission 5: Venore (Dark Catedral)
Mission 6: Carlin (Isle of Kings)
Mission 7: Kazordoon
So, I think the most short in order are: AVIN (Venore), CGB (Carlin) and TBI (Thais).