At a certain stage, Amiri runs off to the Glebelon Uplands, in which a conflict between barbarians and Brevic army is bound to happen.

Head there and aid in battle. Then visit the Six Bears Camp along with Amiri. Note that the old Six Bears Camp is now abandoned, so you will have to travel to a fresh one, at the southwest of Flintrock Grassland).

Listen to the ceremony, which contributes to Nilak becoming the chieftain rather than Akaya.

Finally, you will be able to speak to Nilak and Amiri, and also give 1000 gold to the barbarians to earn some neutral good karma. This is the end of the quest.