Sightless Eye Farming Technique, Massive Hole In Dalaran (Patreon)

There is currently a massive white hole in the water below and to the left of the Black Market Auction House in the sewers in Dalaran. With flying/goblin glider this allows relatively easy access to the hidden and normally inaccessible areas of Dalaran sewers. 

For some classes, this allows the player to farm sightless eyes relatively easily. 

Monks and Warlocks can put down a demonic circle or transference in areas immediately below pvp areas and escape combat instantly. Certain abilities (eg hunter's explosive shot+stampede, mage frozen orb) travel through walls and can be used to attack players remotely with no possibility of retaliation. You only need to tap the player to get rewarded with sightless eyes if they are killed. There are many interesting possibilities here.

It is also enormous fun to Mind Control people into the hole and off the edge of Dalaran.