...
A direct fight against Eredin and the Wild Hunt had become inevitable, and Geralt knew he could never defeat them alone. He thus decided to seek out allies - and his first steps took him to Novigrad.
Brothers In Arms: Novigrad
Quest stages of Brothers In Arms: Novigrad
1. Talk to Triss. / Help Triss finish what she has to do in Novigrad.
2. Talk to Zoltan.
Zoltan will always help you, but it's best to ask him for it once you've completed "A Dangerous Game" quest, otherwise you won't be able to finish it.
3. Talk to Roche. / Help Roche with his problem concerning Ves.
Roche will help you only if you completed "An Eye for an Eye" quest and managed to save Ves during this quest.
4. Talk to Dijkstra.
Dijkstra will not go to Kaer Morhen, but if you have managed to get information about his treasure in "Count Reuven's Treasure" quest, then he will give you 1000 crowns, Diagram: Tracker's gauntlets, Greater Stribog runestone, and Greater Devana runestone.
5. Quest completed.
Geralt's conversations with friends and acquaintances had mixed results. Geralt hoped the support he had secured would be enough to defeat the Wild Hunt. There was no other option.