How to reach Jewel of Atiiki
In order to reach The Jewel of Atiiki you'll first need to take the Guild Hall portal to Katta Castrum. Once you arrive here, travel south through the zone until you go through the second set of double doors then you'll want to turn west and travel a little ways, like shown in the picture above.
The portal to Jewel of Atiiki is just outside the western door of southern Katta Castrum. It's really easy to find, it's the first portal on the left after you go through the door.