snare necklace for troll shaman

[Novoselic]

so i'm tryng to get that snare necklace, but when i went to the dragoon in lfay I almost died to the tier'dal elite. for some reason, they're kos to me except for the prophet and the dragoon himself, i tried turning in the shipment while invis but they just started hitting me. anybody know what I can do to progress with the quest?