Halfhill Farm-Very Fast, Bugged Method Of Creating Spirits Of Harmony And Ghost Iron/Trillium Ore (Patreon)

This method requires a developed farm in the Valley Of The Four Winds in Pandaria.

Currently plots are bugged and producing twice the normal resources. You want to plant songbell seeds and snakeroot as they produce motes of harmony and ghost iron ore (with a rare chance of trillium ore). These materials  still sell fast for very decent amounts of gold in BFA, much more so than other legacy items.

Normally the farm is not competitive with farming Heart Of Fear for motes of harmony and mining for ghost iron ore. With the duplicate resources bug it becomes the fastest way to produce these items.

If you do not have a farm I would urge you to get one: a complicated piece of old content like this rarely works well with any changes Blizzard make and interesting bugs occur quite often.

EDIT:  no further reports have occurred and my own farms seems to have returned to normal. I'm leaving this up because problems with Halfhill keep re-occurring regularly each patch cycle.