Another listing (it's a paste from a textfile i use to keep track of what missions i completed +/- bonus). The three ascension missions can be done in whatever order you want (although the text assigned to the three ghosts is wrong, they react to the wrong missions). I counted ascension as a mission, so it adds up to a total of 25 missions.
|Mission I | The Great Northern Wall
|Mission II | Fort Ranik
|Mission III | Ruins of Surmia
|Mission IV | Nolani Academy
|Mission V | Borlis Pass
|Mission VI | The Frost Gate
|Mission VII | Gates of Kryta
|Mission VIII | D'Alessio Seaboard
|Mission IX | Divinity Coast
|Mission X | The Wilds
|Mission XI | Bloodstone Fen
|Mission XII | Aurora Glade
|Mission XIII | Riverside Province
|Mission XIV | Sanctum Cay
|Mission XV | Elona Reach
|Mission XVI | Thirsty River
|Mission XVII | Dunes of Despair
|Mission XVIII | Augury Rock (Ascension)
|Mission XIX | The Dragon's Lair
|Mission XX | Ice Caves of Sorrow
|Mission XXI | Iron Mines of Moladune
|Mission XXII | Thunderhead Keep
|Mission XXIII | Ring of Fire
|Mission XXIV | Abbadon's Mouth
|Mission XXV | Hell's Precipice
There's 9 missions you actually have to do, in order to proceed (= see the end-cinematic and have access to all areas).
Sanctum Cay (to get to the desert)
Elona Reach/Thirsty River/Dunes of Despair (to get to ascension)
Ascension (to get to The Dragon's Lair - and the Tomb in the desert)
Thunderhead Keep (to get to the Ring of Fire Island Chain)
Ring of Fire (to get to Abbadons Mouth)
Abbadon's Mouth (to get to Hell's Precipice)
Hell's Precipice (to see the final cinematic)
Everything else can be done by exploring, though the most commons are probably: Walking to Nolani Academy (doing the mission) => Walking from Yak's Bend to Gates of Kryta (doing the mission) => Walking from Lion's Arch to Sanctum Cay (the most effective way. Just get from LA to Bergen Hot Springs, take a team to the Temple of Ages and have a full team of lvl 15 henchies to get to Sanctum Cay - you skip 6 missions and save alot of time). Once in Sanctum Cay, you can't do any walking anymore. Though it is possible to walk from Beacon's Perch (the outpost you get to after Frost Gate) right through one billion lvl 24 mobs to Thunderhead Keep. But it's not really time-effective
