Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
As an attentive reader you surely remember that the Wild Hunt could only be defeated with the help of powerful magic, and for this reason Geralt had recruited the most powerful sorceresses in the world, both those he liked and those he utterly detested, to join his cause. When a chance arose to add Fringilla Vigo to the roster, Geralt seized it without a moment's hesitation and went straightaway to the emperor's ship, where the dark-haired sorceress was being held.
