As a bartender in the business of making fancy and complicated cocktails in new york city, i can say categorically that copywriting cocktail recipes is absurd. the majority of cocktails being made are usually spin-offs of classic standards, ie the manhattan or the daiquiri. many of the so called mixologists in the cocktail world aren't nearly as original as they wish to be perceived. copywriting cocktails would kill cocktail culture.
also, mixologist as a term has been abandoned. and with good cause, it's really pretentious. i'll go by bartender personally, because that's what i do.