Optimizing Wriothesley means understanding his scaling and leveraging his HP-fluctuation mechanics. As a Cryo Catalyst user who primarily deals damage through his Normal and Charged Attacks, building him correctly can turn him into an absolute powerhouse on the battlefield. The cornerstone of Wriothesley's optimal build is almost universally agreed upon: * 4-piece Marechaussee Hunter: This set is practically tailor-made for Wriothesley. The 2-piece bonus grants a 15% boost to Normal and Charged Attack DMG. Crucially, the 4-piece bonus increases his CRIT Rate by 12% for five seconds (up to three stacks, totaling 36% CRIT Rate) whenever his HP increases or decreases. This synergizes perfectly with his Elemental Skill's HP drain and his A1 Passive's HP restoration, allowing him to easily cap out on Crit Rate and focus on Crit Damage for his substats. This is the equivalent of a perfectly tailored suit of armor, enhancing his innate strengths. While Marechaussee Hunter is generally the best-in-slot, other options can be viable depending on your team composition and artifact availability: * 4-piece Blizzard Strayer: This set is excellent in Freeze teams, as it provides a massive 40% CRIT Rate bonus against frozen enemies, and an additional 20% against enemies affected by Cryo. If you can consistently keep enemies frozen, this can be incredibly strong, potentially allowing you to focus even more on Crit Damage. However, its effectiveness drops significantly against bosses or enemies that cannot be frozen. * 4-piece Shimenawa's Reminiscence: While it provides a substantial boost to Normal and Charged Attack DMG, it comes at the cost of Energy, making his Burst less accessible. This is generally not recommended unless you are specifically aiming to disregard his Elemental Burst entirely. * 2-piece mixes: Combining two 2-piece sets like Blizzard Strayer (15% Cryo DMG Bonus) with either Gladiator's Finale or Shimenawa's Reminiscence (18% ATK) can be a decent temporary solution if you haven't farmed a full 4-piece Marechaussee Hunter set with good substats. Main Stats Priority: * Sands: ATK% * Goblet: Cryo DMG Bonus% * Circlet: CRIT Rate% or CRIT DMG% (Depending on your artifact substats and weapon, aim for a balanced Crit Ratio, especially with Marechaussee Hunter and Cryo Resonance providing significant Crit Rate) Substats Priority: Crit Damage = Crit Rate > ATK% > Energy Recharge (if you want to burst consistently) Wriothesley, as a Catalyst user, has access to a range of weapons that can significantly enhance his damage. His signature weapon is naturally his best-in-slot, but several other strong options exist. * Cashflow Supervision (5-star, Signature Weapon): This weapon is designed specifically for Wriothesley. It provides a CRIT Rate substat and a passive that synergizes perfectly with his HP fluctuations, increasing Normal and Charged Attack DMG and providing ATK SPD bonuses when his HP changes. It's the ultimate tool for maximizing his on-field damage. * Tulaytullah's Remembrance (5-star): Another excellent 5-star option, offering a high Crit Damage substat and a passive that boosts Normal Attack DMG and ATK SPD after using an Elemental Skill. This fits Wriothesley's playstyle perfectly. * Lost Prayer to the Sacred Winds (5-star): This Catalyst provides a Crit Rate substat and increases Elemental DMG Bonus as the character stays on the field, which is ideal for an on-field DPS like Wriothesley. * Flowing Purity (4-star, Craftable): An excellent F2P option that provides a good ATK% substat and a passive that increases Elemental DMG Bonus after using an Elemental Skill, with a slight HP drain that can be beneficial for Marechaussee Hunter. It's a fantastic accessible choice that performs remarkably well. * The Widsith (4-star): This weapon offers a Crit Damage substat and a powerful, though randomized, buff upon entering the field. While inconsistent, its burst damage potential is high if you get the right buff. * Sacrificial Jade (4-star, Battle Pass): Offers Crit Rate and a passive that increases HP and Elemental Mastery. While not his absolute best, it can be a decent option in certain team compositions, especially if Melt reactions are a focus. Wriothesley's Cryo element and on-field DPS playstyle open up numerous possibilities for powerful team compositions, primarily focusing on either Melt or Freeze reactions. He thrives with support characters who can provide consistent off-field elemental application, shields, or healing. Reverse Melt is a highly potent reaction where Pyro triggers on Cryo, leading to significant damage amplification. * Wriothesley (Main DPS) * Pyro Applicator (Off-field): Characters like Xiangling (Pyronado provides excellent off-field Pyro application), Dehya (Skill can apply Pyro), or even Thoma (shield and Pyro application) can work. Mavuika is also mentioned as providing off-field Pyro damage and application. * Anemo Support (VV Shred): Kazuha or Sucrose are invaluable for grouping enemies, providing Elemental Mastery buffs (for Melt damage), and crucially, shredding enemy elemental resistance with the 4-piece Viridescent Venerer set. Xianyun can also open up Plunge playstyles while providing healing and VV Shred. * Shielder/Healer/Buffer: Zhongli (best shield), Bennett (massive ATK buff and healing), Layla (Cryo shield and off-field Cryo application), or Diona (shield, healing, Cryo particles). Furina is also an excellent option, providing a significant DMG Bonus buff to the team. Example Reverse Melt Team: Wriothesley, Xiangling, Bennett, Kazuha. This classic team provides strong Pyro application, healing, ATK buffs, and Elemental Resistance Shred, allowing Wriothesley to consistently trigger powerful Reverse Melts. Freeze teams prioritize perma-freezing enemies for crowd control and increased survivability, while also enabling the 4-piece Blizzard Strayer artifact set. * Wriothesley (Main DPS) * Hydro Applicator (Off-field): Xingqiu (consistent single-target Hydro application and damage reduction), Yelan (similar to Xingqiu, provides damage bonus), or Kokomi (healing, Hydro application, can hold Tenacity of the Millelith). Furina is also a top-tier choice for Hydro application and damage amplification, especially with her HP fluctuation synergy. * Cryo Support (Cryo Resonance/Particles): Shenhe (massive Cryo DMG buffs, especially for other Cryo units), Rosaria (Crit Rate buff, off-field Cryo, battery), Layla (shield, Cryo application), or Charlotte (healing, Cryo application). * Anemo Crowd Control/VV Shred: Kazuha, Sucrose, or Venti for grouping enemies and applying Viridescent Venerer resistance shred. Example Freeze Team: Wriothesley, Furina, Shenhe, Kazuha. This team provides consistent Freeze, massive Cryo and DMG buffs, and excellent crowd control. Wriothesley can also be integrated into other team archetypes: * Mono Cryo: Focuses on maximizing Cryo damage with multiple Cryo characters and Anemo support. * Hyperbloom (with Dendro/Electro): While not his primary role, Wriothesley's consistent Cryo application can interact with Hydro and Electro for Freeze and then Hyperbloom reactions, though this requires a more specialized build and specific teammates. Regardless of the team, a shielder is often recommended for Wriothesley due to his focus on uninterrupted Normal Attack combos and the HP drain from his skill. A healer is also crucial, especially at C0, to manage his HP fluctuations and maximize his damage output.