Whilst leveling at Deepholm, I've come to the following quest - Undying Twilight

While killing the mobs, I noticed that they have an infinite respawn timer, frequently drop embersilk cloth and greens (as well as a few silver) and only have to be tagged to get the loot while you let the npc's kill them for you. Great farming location for Enchanters and Tailors but bear in mind they do not give any exp at all.

At the end of the day, it's not exactly an exploit but it sure will help me with my tailoring and enchanting nicely and I hope it might help you guys too.