Overview
Hu Tao is popular because of her high-risk, high-reward playstyle. The lower HP she is, the more damage you do, so a certain level of skill is required to play this character effectively. But those who do are rewarded with one of the best characters in the game.
Elemental Burst: Spirit Soother
Hu Tao swings her ghost, dealing AoE Pyro damage 360° around her with a higher multiplier while below 50% HP and healing per target hit.
This is her greatest source of AoE damage. But contrary to popular belief, SS is only 10-20% of Hu Tao’s overall single target damage, being worth a bit more damage than 2 Charged Attacks. Always use her E before her Burst, or you're wasting it.
Constellations
C1: Crimson Bouquet
One of the strongest constellations in the game. Lets you spam charge attacks without needing to dash cancel, and speeds up the process of applying Blood Blossoms to enemies.
C2: Ominous Rainfall
Doesn't add much, but is useful when Hu Tao is off field.
C3: Lingering Carmine
+3 to her Skill, incredible increase in Blood Blossom damage.
C4: Garden of Eternal Rest
Good for Co-Op, but not much else.
C5: Floral Incense
+3 to her Burst. Great for one-shotting bosses, and is a general damage increase.
C6: Butterfly’s Embrace
This is a staple Constellation for avid speedrunners, providing an astonishing average DMG increase for a single rotation. However after this, it goes on a 1 minute cooldown, during which time you’re stuck with whatever Crit Rate is on her from sub-stats.
Teams
Hu Tao is an amazing DPS, but she requires a teammate who won't heal much and can proc reactions for her to become the monster she truly is. Xingqiu is her best support because of his great synergy, but there are others.
Hu Tao + Xingqiu + Kazuha
Hu Tao + Xinqiu + Zhongli
Hu Tao + Xiangling + Kazuha
Hu Tao + Xingqiu + Beidou