Awesome trick really.  In this farm we'll be taking advantage of game mechanics to exploit a way into getting more defias loot drops.  The defias leggings and gloves have respective selling prices of 3,000g and 14,000g and only drop from 1 mob in the instance a staggering 1% of the time.  But do not fret, we can get the upper hand on this.  Much like past drop-combat farms, if you kill just one of the two defias overseer's in the instance, THEN drop combat, the one you killed will instantly respawn.  The trick here is to bring a character that can consistently drop combat and score many more kills than the average farmer.  To date, a hunter is best – with night elf being slightly better because of shadowmeld.  You can also bring potions of invisibility to boost the effect.  Anyway, while the average farmer only gets 1 shot to get these super rare xmogs, with this method you can get up to 40 chances in an hour.  Seems fair right?
War Mode: War Mode can be turned on at level 30 through your talent window, and will give you 10% bonus XP. You will, however, be attackable by players of the opposing faction, but changes have been made so that all players have a fair shot in a fight and even low-level players can kill much higher level players, and at least not get ganked and one shotted. Note: As of patch 8.1, you can get an additional call to arms bonus with war mode on if your faction is underepresented.
Most raids tend to have Bind on Equip loot dropping, and some of these pieces look very good! That means people will pay nicely for them. They aren't bad either for leveling purposes. WOD raids are an excellent choice, as each piece usually always sells for several thousand gold, many even closer to ten thousand instead. Let's take a closer look a those drop rates!
Hands. Down. The. Best. Whelping. Spot. Ever.  There are soo many spawns, and too many whelpings.  This spot is very close to becoming an infinite farm.  You just cant run out of targets to hit in such a confined area.  Each whelping has an 0.09 chance to drop a dark whelping – which may seem small until you realize you can easily down 40 whelps in a minute.  And by the time you finish, they will respawn.  The farm takes place at the ruins of Kargath in badlands and is usually empty.  Noone seems to visit this spot, probably because its more hit-or-miss than direct gold.  If luck finds you, you can walk away with a popular pet that's worth a pretty 14,000g
A farm that I myself made drastically popular about 2 years ago.  This farm is a simple pet and transmog spot that requires you to pull the entire wailing carverns instance.  Besides how it sounds, this farm is VERY easy going and can literally be done while you watch something else entirely.  (netflix maybe?)  While it's not as potent as it used to be, it still has some merit in it, especially if your server is low on the deviate hatchling pet.  While it does take some time to drop, I can usually average  a deviate hatchling every 30 minutes or so.  However, since I released the video on it, the price of the pet has dropped wildly.
This farm almost did not make this list. Even though I have had only a little luck with it, it seems to be gathering some popularity in the gold farming community.  Although I feel with the recent changes in 7.3,  this farm is very close to dying out.  Generally what you want to to do is pull every mob you can as you venture to the last boss in the instance.  The only saving grace of this farm (if you can call it that) is that some mobs are GUARANTEED to drop greens.  Guaranteed.  Whether or not they drop profitable greens is a different question, however it's a must-mention quirk you get from running this instance.  It also allows you to get your hands on some rare low level blues.
The NPC scan and NPC alert method is an awesome way to build a stock of rare BOE items simply because you don't really have to try.  By installing NPC scan and NPC alerts, you can literally just fly over anywhere and be alerted when you pass a rare spawn.  As we all know, rare spawn loot tends to have higher item vales, as not everyone is able to consistently farm them.  Some NPC's, especially those in outlands have those higher item values when compared to the rest of the world.  As a goldmaking method I just everyone should be doing this.  It only requires you download two addons and you can get access to important NPC,s that you would otherwise never knew existed.  The opportunities are endless, I would generally never play without these cool addons.  Realy cool.