General Method Description

Astral runes are an essential ingredient in Lunar Magicks spells, while flax is a key ingredient in Crafting to make bowstrings for Fletching. Astrals are normally crafted by running from the bank on Moonclan Island to the altar, making the runes and then teleporting back to the bank again. A somewhat different option for those looking to make money, though, is to modify the conventional Runecrafting method to include picking flax at the field that lies between the bank and the altar. Naturally this slows down the Runecrafting quite a bit, but when flax is valuable it can be a better moneymaker, especially before you can make double astrals. It might also be just a bit less boring, since you're doing two activities. :)

At high levels you can only get one astral per essence, so you can make more money by using a beast of burden to carry extra flax. Due to the high cost of war tortoise pouches, that should be a spirit terrorbird. At very high levels you get two astrals per essence and so using an abyssal lurker is a wiser choice.