You can path toward:

Resonant Lattice - Essences become more common and Path of Exile 2 Currency rewarding.
Harmonic Corruption - increases Essence monster modifiers, making them tougher but more lucrative.

For players aiming to trade, Essences are one of the fastest ways to stockpile wealth and buy POE2 Items for late-game builds.

Optional Keystone: Unstable Energies

At the bottom of the tree, you'll find Unstable Energies, a Keystone that increases the effects of Prefixes and Suffixes on Waystones.

Pros: Makes favorable affixes (like +Item Quantity or Rarity) much stronger.
Cons: Bad affixes (like reduced player resistances) become more punishing.

If you're confident in your mapping efficiency and don't mind dealing with tougher mods, this Keystone is a high-risk, high-reward pick. Otherwise, leave it for later min-maxing.

Final Thoughts

The best Atlas Tree route for farming currency in Path of Exile 2 (0.3.0) revolves around a simple philosophy:

1. Boost monster density
2. Scale item rarity
3. Add layers of rewarding mechanics like Essences

Following this path ensures your maps are consistently packed with monsters that drop higher-value loot, making every run profitable. While specialized farming strategies (like boss-rush or unique-target farming) have their place, nothing beats raw currency farming for steady, reliable income.

By combining the right Atlas Tree progression with rarity-stacking gear, you'll have a strong foundation to fund any build or cheap POE2 Currency chase any unique in PoE2's brutal endgame.