Juan Meyer's original recipe calls for equal parts: Redemption rye whiskey, Suze, Amaro de Montenegro, and lemon juice. It's very tasty but I couldn't...
I'm always hesitant with recipes with Suze in because on its own -- to me -- it's so bitter that it feels like it'll completely take over everything. Not here - it's definitely a Suze cocktail but it's perfectly balanced.
Original recipe is quite good, my wife and I are big fans of Tequila and Mezcal. Try Blanco Tequila instead of Rye and Mescal instead of Bourbon. You won't be disappointed.
I definitely liked the "revised" version (3 whiskey, 3 amaro, 2 gentian, 2 lemon) better. An interesting cocktail, where you can play with different amari to find the one that works best for you. I wouldn't do it again for aperitivo though, I will use it as an after-dinner