Weapons
Best in Set
Crimson Moon's Semblance
Primordial Jade-Winged Spear
Deathmatch
Ballad of the Fjords
White Tassel
Alternatives
Staff of Homa
Staff of Scarlet Sands
Calamity Queller
Missive Windspear
Lumidouce Elegy
Artifacts
Best Set
Alt Set
2 + 2 Set
Main Stats; Piece Three: Attack or EM if in a Vape or Melt team Piece Four: Pyro Damage Bonus Piece Five: Crit Rate or Crit Damage Sub Stats: 1. Crit Rate/Damage 2. Attack% 3. EM if in a Vape or Melt team 4. Flat Attack Recommended: Attack = 2600+ Crit Rate = 70%+ Crit Damage = 160%+ At least try to keep a 1:2 Crit Rate to Crit DMG ratio. Other Stats: HP = Doesn't matter. ER = Burst is mostly unused unless C6, so don't focus on ER. EM = Only focus if you are using her in a Vape or Melt team, in which case, try for around 200+.
Talents
Normal Attack to level 9 or 10 as that is where a lot of her damage comes from.
The second priority goes to her Elemental Burst but unless you have her at C6, then it should only be used to heal as it is a pretty big damage loss so about level 6 is a good stopping point unless you are at C6.
Her Elemental Skill is not very important since all it does is some passive damage will the marks are on the enemies and give her Bond of Life value so you can keep it at a lower level.
Budget Team
Constellations
C1: All Reprisals and Arrears, Mine to Bear...
Masque of the Red Death is further enhanced, the value of the increase is 100%. Additionally, Arlecchino's interruption resistance is increased when she performs Normal Attacks while affected by the Masque of the Red Death.
C2: All Rewards and Retributions, Mine to Bestow...
Blood-Debt Directives are now already Blood-Debt Due when first applied. When Arlecchino absorbs such a Due, she unleashes Balemoon Bloodfire in front of her, dealing 900% of her ATK as AoE Pyro DMG and increasing her All Elemental RES and Physical RES by 20% for 15s. This effect can trigger once every 10s.
C3: You Shall Become a New Member of Our Family...
Increases the Level of Normal Attack: Invitation to a Beheading by 3. Maximum upgrade level is 15.
C4: You Shall Love and Protect Each Other Henceforth...
When Arlecchino successfully absorbs a Blood-Debt Directive, Balemoon Rising's CD will decrease by 2s and 15 Energy will be restored to her. This effect can occur once every 10s.
C5: For Alone, We Are as Good as Dead...
Increases the Level of Balemoon Rising by 3. Maximum upgrade level is 15.
C6: From This Day On, We Shall Delight in New Life Together...
The DMG of Balemoon Rising is increased by Arlecchino's ATK multiplied by 700% of Arlecchino's current Life Bond percentage. For 20s after Arlecchino uses All Is Ash, both her Normal Attacks and Elemental Burst gain 10% increased CRIT Rate and 70% increased CRIT DMG. This effect can be triggered up to once every 15s.
How to Play
When playing Arlecchino, the main thing to keep in mind is to keep her Bond of Life percentage high as her damage scales off how much you have plus, since she can't be healed in combat, you can't clear the Bond of Life unless you Burst or use too many Normal Attacks with using her Skill.
You want to start combat by applying her Elemental Skill to enemies, then swap out to other party members to apply buffs or use any supportive abilities, then swap back in when the Blood-Debt become Due and use a Charged Attack to absorb the Dues to gain Bond of Life percentage. You should not stay on field long enough to run out of Bond of Life value.