Given that Harper is a breaker focused on high firepower, the value of the Burning Greed set, which enhances both break performance and damage output, has significantly increased.

Aside from this, it is recommended to equip New Hunter or Palace Guard for armor, and Behemoth, Viridescent, or Obsidian for accessories.

For stats, prioritize health (as it's tied to skill scaling), critical hit rate, critical damage, defense penetration, and increased damage for optimal performance.

Overall Priority: Burning Greed Set

• A 30% increase in break effectiveness against elemental weaknesses is fundamental for breakers.
• The boost in critical hit rate and damage for both Harper and her team makes this set universally valuable, but it holds even greater significance for Harper due to her already exceptional damage output.

Alternative Armor: New Hunter or Palace Guard

• New Hunter: Enhances break effectiveness against elemental weaknesses, serving as a lower-tier alternative to the Burning Greed set, making it a good transitional artifact.
• Palace Guard: Increases damage dealt for 10 seconds when a shield is activated, making it ideal for Harper at 1st advancement or higher, and pairs well with Charlotte.

Alternative Accessories: Behemoth, Viridescent, or Obsidian

• Behemoth: Provides a straightforward damage increase.
• Viridescent: Increases damage and reduces cooldowns, though at the cost of more mana, making it useful for faster breaks.
• Obsidian: While managing remaining mana can be challenging, it compensates with a significant damage increase, offering a strong payoff for skilled players.