Wayne Collins, this drink's creator, originally used equal parts as is usual for a classic Negroni and after trying various other formulations, I've found...
… just looked at the recipe, Calvin…Still recovering from early traumatic experiences with midori so haven’t tasted it in over 30 years… maybe one day…!
So no Green Negroni? Had a bad experience with José Cuervo gold back in the 70's. Was many years till a good tequila found me and relieved my aversion.