While Citlali mainly provides sustain through her shield, her passive Mamaloaco's Frigid Rain, which provides Hydro and Pyro RES reduction, and the ability to fully utilize give her access to great offensive utility for the team.
Regarding Weapon Choices:
Angelos' Heptades: After reaching Energy Recharge requirements, to maximize the team buff provided by this weapon, you can build ATK% for artifact main stats and sub stats.
Thrilling Tales of Dragon Slayers: Only use this weapon if a teammate, who does significant damage, benefits from ATK%.
Wandering Evenstar: Best used in teams where multiple units benefit from Flat ATK.
Regarding Artifact Choices:
Main Stats
CRIT Rate: Only recommended if using a Favonius weapon.
Substats
CRIT Rate: Only recommended if using a Favonius weapon.