Fastest way to farm echoes?

[Zaria-black-dragonflight (Zaria)]

@Runastar-illidan

you need to have unlocked the level 3 on another character before you can buy it from mother

This.

If your main character hasn’t earned the Rank 3, you can’t buy the Rank 3 from Mother.

Purchasing the rank 3 essence from Mother with echoes is more of an alt catch up thing.