Because of Bruxish's Wonder Skin ability, she has the potential to be an excellent pokemon for hunting or raiding. But she's currently a forgotten pokemon that's rarely used. One of the reasons it's underutilised is that its moveset is very mixed. And since we already have a huge number of water-type pokemon that are great, my suggestion is to make her stronger on the psychic side.
Bruxish
Aqua tail
Psychic Fangs
Aqua jet
Water Gun
Confusion
Water Shuriken
Disable
Psycho Shift
Rain Dance --> Psyblast
Synchronoise
Shiny Bruxish
Aqua tail
Psychic Fangs
Snatch
Water Gun
Imprision
Water Shuriken
Disable
Trick Room
Rain Dance ---> Psyblast
Synchronoise