Highlighted weapons are free options.
Xingqiu's Off-Field DPS build centers on his ability to deal damage and apply an immense amount of Hydro off-field with his Burst. His Energy Recharge needs can change a lot based on team and constellations, and so do his list of recommended weapons. As such this serves a general idea of which weapons are most viable on Xingqiu.
Rotations:
Quick:
Longer Rotation (C4+): *
*One can use the Book trick method instead of the final which involves pausing the game by opening a menu for a second to allow him to collect the particles.