Wayne Collins, this cocktail's creator, originally used equal parts as is usual for a classic Negroni, and after trying various other formulations, I've...
Went looking for a bottle of Kina L'aero d'or when I first started making the Corpse Reviver 2 a few years back and couldn't find it locally. After seeing your post, I checked around and found it is available now. Finally got some cognac to try the Topgallant you suggested but alas, I've polished off that recent bottle of Bonal. Guess it's off to the market tomorrow to get both!
Haven't got the Kina yet but I did try the Topgallant. It's excellent and on the favorites list, thanks for the suggestion. Wasn't the Bonal I was out of but the Cocchi Storico and now I have both. Yaay! How are you liking the Strega?