Thanks to ShailRaveN for helping with this!
The Exchanger Arranger trophy covers conversations that take place in chapter 4.2. My order is based partly on where the story takes you and when and where I was when I was delivering Buddy’s letters.
- Central Station – Talk to the 2 Flumylym looking at the map when you come back from the cave at the start of the chapter.
- Social District – Talk to Chris BEFORE or AFTER his letter. He needs to be exercising with the Flumylym to get the right conversation, not sitting with them.
- Cave – Talk to the Secretary – If you’re not already here delivering Brigitte’s letter, you can combine this later when you talk to Warren and Major.
- Agora Arcade – Talk to Sunny & Warren even if you already have the Insider Trading trophy. You need Warren to move to the cave and this is what gets him there
- Agora Arcade – Talk to Tommy – I think you have to visit him twice. The first time he’ll be in a never-ending conversation with a Flumylyn, so trigger that then go do something else (I delivered Rafi’s letter but you can do the coffee talk one too) and come back.
- Agora Arcade – Talk to the two Flumylym upstairs having coffee
- Cave – Talk to Warren and Major (and the Secretary if you didn’t earlier)