Tier System for Buff Gems
Buff Gems in Path of Exile 2 come in three distinct tiers, which unlock progressively as you level up your character:

Tier 1 (Low Level Buffs)

Gem Level: Starts at Level 4
Character Level: Available from Level 10
Effect: Provides basic buffs suitable for early-game progression. Examples include Anger for fire damage or Determination for defense.
Function: These buffs are primarily used to POE currency enhance your basic gameplay and provide foundational support as you level up.
Tier 2 (Mid-Level Buffs)

Gem Level: Starts at Level 8
Character Level: Available from Level 26
Effect: More potent buffs that enhance both survivability and damage output. These buffs are typically stronger and more versatile, allowing for a more refined playstyle.
Function: As you progress into mid-game, these buffs help bolster your character's effectiveness and can be critical for surviving tougher content.
Tier 3 (High-Level Buffs)

Gem Level: Starts at Level 14
Character Level: Available from Level 58
Effect: Endgame buffs that offer extremely strong bonuses, usually requiring significant Spirit and synergy with your Ascendancy. Examples include Purity of Elements (Elemental resistance boost) or Vitality (increased Life regen).
Function: These buffs are tailored for buy POE2 Currency the later stages of the game, helping you overcome the most difficult challenges.