Reaching level 80 and Orr
There’s something here you aren’t aware of. The Karma vendors are only unlocked when the various Temples become uncontested. And getting them uncontested requires a chain of DEs in which the last of them is really tough.
So, don’t expect them to be uncontested too often on your server.
There are other ways to get level 80 Exotics though. Crafting (or buying the crafting ones on the TP), Dungeons (getting dungeon tokens and exchanging them for Exotic gear), and there’s also WvW PVP, where you can get tokens and exchange for Exotics (so I believe).
What I would recommend you do first, is go to Frostgorge Sound (70-80 zone) and do all the Hearts there. Talk to all the Hearts vendors after completing the Hearts and get the Green gear with Karma.
Also, if you want to skip that, you can get Green level 80 stuff from the TP pretty cheaply.
Good luck.
BTW: Orr is composed of 3 areas (Straits of Devastation, Malchor’s Leap, and The Cursed Shore). So, being in Straits of Devastation, you are already in Orr
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This might help get you started. The Ruins of Orr is actually three game zone. You found the first one, Straits of Devastation, that you will need to traverse first. The second game zone is Malchor’s Leap and you will find it to the far west of the Straits. After you have traveled through Malchor’s Leap, you will come to the Cursed Shore. This is to the far south west of Malchor’s Leap.
The temples I think you are looking for are found in Malchor’s Leap and the Cursed Shore. When the risen have been beaten away from the ruins of the temples, vendors will show up that sell exotic armor you can buy for karma.
Just as a warning, 100k of karma will only buy you two pieces of armor. And the armor that is available in each temple has different stats so you might have to go to different temples to build the armor set you want.
Welcome to Orr, where the risen are numerous and unforgiving.
This might be helpful: http://dulfy.net/2012/09/08/gw2-templegod-karma-armor-sets/
Orr takes some getting used to but it’s not too bad once you get the hang of things.