Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
It proved quite the ordeal for Regis, a sacrifice one might say. But they obtained the last ingredient required for Resonance, and the vampire could prepare the concoction. Geralt drank a dose, and visions ensued. He saw Dettlaff meet and speak to a young bootblack. Then the witcher and the vampire set off in search of the boy.
