Understanding Respec Options
Orbs of Regret:

Currency Use: Orbs of Regret are the primary currency used for Path of exile currency respecing passive points in the skill tree. These can be acquired through various means, including quest rewards, chests, and map drops.
Cost Efficiency: Use these sparingly, focusing on key adjustments that significantly impact your build’s effectiveness or farming strategy.
Passive Tree Flexibility:

Respec Points: Each character starts with a certain number of passive points, and you can respec these points to reallocate them to suit your current needs. Keep in mind that reallocating points costs more as you spend more.
Strategic Adjustments: Instead of fully committing to a single build, consider a hybrid approach that allows for adjustments based on gameplay experiences.
Managing Flexibility
Dynamic Build Adjustments:

Start with a Generalist Build: Initially, consider using a versatile build that can adapt to various content types. This allows for gradual adjustments as you identify specific weaknesses or strengths in your playstyle.
Incorporate Hybrid Mechanics: Utilizing skills or cheap Path of exile currency passives that synergize well with multiple mechanics (e.g., a build that can farm both currency and engage with league mechanics) offers greater flexibility.