Best Team for Mona in Genshin Impact
Team #1: Morgana (Ganyu Freeze)
Ganyu takes advantage from the Freeze reaction, Cryo resonance and 4pc Blizzard Strayer to gain 55% Crit Rate (+20% from A1 passive = 75% Crit Rate on her charged attacks). She is the main damage dealer and her numbers get furtherly increased by Cryo swirl and her own passive talents. This team mostly uses Ganyu's burst as a main source of DPS together with Venti's, as both have quadratic scaling (more enemies hit = more damage). Note: Bosses can't be frozen, so this team is not effective against them.
Team #2: Mona International
Team #3: Mona Tazer
Team #4: Hu Tao double Hydro
Hu Tao is a high-risk high-reward character: she needs to be played while at low health, but her damage almost has no even. Because of that a shield is always recommended while playing her, and the new Hydro Resonance added in 3.0, further boosting her HP to ATK conversion made her even stronger.
Yelan is what made Double Hydro comps actually viable, but the new Hydro Res made them the strongest comps in the game, especially with Hu Tao, because of her HP to Atk conversion. Yelan will act as a Off-Field DPS and an additional enabler for Hu Tao, alomg with Mona.
Zhongli's role is to prevent Hu Tao's interruptions with his shield, while also preventing her from dying. Zhongli has the ability to keep his shield at 100% uptime and shred the enemies' resistances.