After 5 hours of laddering with the ones doing ladder tour...finally got a win vs a 1200 with using only Sound-based moves
https://replay.pokemonshowdown.com/gen9uu-2123674628-chuwcq0i66mlyt9h0zl59smm3hxh4pupw
Moves used:
Meloetta - Relic Song (sleep is clutch), Hyper Voice, Alluring Voice...