Originally Posted by
scubistacy
You probably will need to farm reputation for the Argus faction, though. I earned all prerequisites on my Horde main character, and then leveled an Alliance character to get the Allied Races there - and the attunement check on wowhead still told me that I need reputation on my Alliance alt.
But it's not that hard to get anymore, especially if you create a human character with 10% reputation bonus, and funnel all reputation tokens from OH missions and Argus WQs to that character.