I spent a lot of time in ZG finding ways how to farm bloodvine and I found bloodvine very good and very fast for earning gold and i decided to show most of the ways how to do it alone so we can all together wait for one big nerf :p
There is about 30 spots in ZG where you can farm it using tricks that you will see here and u also can see them marked on map.
All you need is Herbalism on 280 and Bloodscythe which you can get from hoodoo piles in ZG. Hoodoo piles are also easy to grab using ways you'll see in this movie and you just have to remember that you can loot piles only if you're out of combat so you can vanish before looting etc...
You should watch for bats while walking in ZG because they spawn on random locations and they can see you threw stealth.
Druids are also able to "operate" on some spots and expecially on those where they can go out of combat so they don't have to die.
There is few more ways how to farm bloodvine but some are really tough so no really point to lose time on them...
Good thing is to put macro for vanish combined with item rack that will take off your gear so you don't have repair builts during vanish bug or failed tries...
Miners can also find their luck in some situations :)
Enjoy & hf!.