Immortal Flame promotion

[Ricje]

You have to complete the main story and then the commander of your GC will give you a quest for Ampador Keep.
After you finish it you'll be able to get your 2nd Lieutenant promotion (if you finished the GC hunting log).
It doesn't state this anywhere unfortunately which might come over as confusing. This is however how it's done.

In steps (assuming 2ndLTN is the last promotion to go):
* Finish GC hunting log rank 2
* Hit level 50
* Finish main story
* Go to GC commander for new quest
* Finish Amdapor Keep
* Promote