The Consortium Reputation Guide
The Consortium reputation consists of a group of Etherals. This is one of the hardest, if not the hardest reputation to raise in The Burning Crusade. The Consortium reputation doesn't neccessarily have a main hub, however it's Quartermaster is located in Stormspire, in Netherstorm. There are three ways to raise your consortium reputation. One by running Heroic Mana Tombs, One by collecting Obsidian War Beads from Nagrand and the third by collecting Zaxxis Insignia's from the Etheral's in Netherstorm.
The Etheral's is my personal favorite for raising Consortium reputation. However, if you can plow through Mana Tombs quickly that will give you the best bang for your buck. The final way which is in Nagrand is the worst way to raise your reputation. Collecting the Prayer Beads should only be done if you need to raise your Mag'har/Kurenai reputation at the same time. Below is a picture of the best place to farm the beads in Nagrand.
The only place to farm the Zaxxis Insignia's in Netherstorm is a tad west of Area 52. The Insignia's will always drop but in order to get the quest to turn many of them in you will need to complete this pre-quest first. While you're farming for Zaxxis Insignia's you will also find Ethereum Prison Keys which you can use on the prisons far north of here. When opened they will bring out a NPC that will raise your reputation with a certain faction or a monster. When the mob is killed he will drop a Etherum Id tag that can be turned in at the camp to the north and a green. For more information on this, view my video below.