Beast Blood in Zitah

Levels 50+

Items of Interest:
Fiend Blood (AH)
Beast Blood (Vendor)
Wind Crystal

Another great spot is the Lesser Gaylas Bats in Zitah. The drop of Beast Blood from them is amazing, roughly 75% or more. These guys will also drop Fiend Blood, which you may find better to Auction House, then vendor depending on your server. You can also auction house the Beast Blood, but with people under cutting and all that fun stuff it will be easier to just vendor it.