Budget Atlas Strategy for Leveling and Currency Farming
For players aiming to Path of exile currency complete the Atlas solo without purchasing maps, a budget strategy using Orbs of Horizon is effective:

Map Sustain Strategy:
Focus on using Orbs of Horizon to fill out your Atlas by completing maps not yet run.
Upgrade maps to magic or rare quality to increase map drops and sustain your map pool.
Continuously completing the entire Atlas this way early in the league accelerates your progression and earns you Atlas passive points.
Alch & Go Atlas Strategy for Low Budget Builds
Once your Atlas is completed and you have finished most unique maps, the Alch & Go strategy becomes viable:

Profitability and Map Sustain:
Focus on alching maps and running them for increased quantity.
Utilize Scarabs strategically to boost map returns and profitability.
Ideal for low budget builds aiming to POE buy currency sustain high tier maps efficiently without extensive investment.