Seer's headband 2 or better (recommended if using Seer's village)|
|Inputs (127,400)||Outputs (803,600)|
The best possible method is to use the spinning wheel directly underneath the Lumbridge Castle bank. A full load of 28 flax takes approximately 50 seconds to convert into bowstring. Travel and banking time is ~20 seconds in between loads. You should use a preset with flax in your inventory to speed up the process.
An alternative method is to wear Seer's headband 2 and run between the bank and Seer's spinning wheel house, above the ladder, and you will be able to spin the flax 33% faster.
Staff of air or equivalent replacement
|Completed Dream Mentor|
|Inputs (4,426,200)||Outputs (5,166,000)|
This method assuming 10 seconds per inventory with 25 flax spinned every time. It is highly recommended you make a bank preset with 25 flax, 5 Astral runes and 10 Nature runes.