This guide shows you one or more of the best and most efficient routes to farm Mote of Mana in World of Warcraft Classic and is exactly what you need if you want to gather materials yourself instead of spending your gold on it on the auction house. If Mote of Mana is not what you are looking for, you may take a look at all available farming guides.
Farming Motes of Mana in Netherstorm
If you have a lot of competition on the spot above, you can use the following one. You are looking for rays and mana worms here.
Farming Motes of Mana in Shadowmoon Valley
To farm the rays at this spot efficiently, you need a flying mount.
Farming Motes of Mana as an Engineer – Netherstorm
The Particle Extractor gives you the ability to farm Motes of Mana from Gas Clouds all over the area.
For suggestions, improvement proposals or in case of finding a bug you are
welcome to contact me on my Goldgoblin Discord. Thanks a lot!