Sorrowdusk Isle chain is long and repetitive. Furthermore, completing the entire thing can take a long time and it's hard to keep a group together for it. So here is my suggestion:
Split the chain into two sections, in which the quests you get from Elder Bruku (sp?) are in one chain, and the quests you get from the ogre chieftain are in another. Completing the first quest chain is not a requirement for the second. Not sure how the end reward loot would be split up, though...