Symphonist of Scents is the closest fit on the game's own numbers: Yaoyao's kit multiplies ATK, and a weapon is ranked here on whether its ascension stat and its passive act on that stat. Bloodsoaked Ruins, Lithic Spear and Skyward Spine come next. No playtested ranking has been imported for Yaoyao, so this is arithmetic over the kit data rather than a damage measurement.
Run Deepwood Memories on Yaoyao, with A Day Carved From Rising Winds and Disenchantment in Deep Shadow behind it. Main stats are ATK% sands, Dendro DMG Bonus goblet, CRIT Rate / CRIT DMG circlet. Roll substats in the order CRIT Rate > CRIT DMG > ATK% > Energy Recharge.
Talent priority is Elemental Burst > Elemental Skill > Normal Attack. The Elemental Burst costs 80 energy, which is what an Energy Recharge target has to clear.
The strongest team is Alhaitham, Xingqiu, Raiden Shogun and Yaoyao, built around Yaoyao: Dendro · Hyperbloom.