This is a special drink. The nose of Cachaça is really nice against the Gran Classico (which is criminally underused) and the sweetness of the rum (I used Flor de Cana 4).
This was a quite good Negroni variation. The Tsipouro takes a back seat to the Campari, but not in an unpleasant way.
We also tried a Ouzo Negroni, which also worked very well. Basically a Negroni with anise instead of juniper.