I love the spice mezcal brings to a Negroni that is going beyond the mellowness of a regular Negroni and much rougher than a boulevardier. I still wouldn't choose a very smokey mezcal, as the flavor will stand out a lot. I use a tamer mezcal with fruitier notes than for example Del Maguey Vida.
A go to negroni for me. For mezcal, I use Montelobos Espadin, and for the Italian red bitters, I use Rinomato L'Aperitivo Deciso. Adding some lime or lemon adds a little acidity to the smokiness of the cocktail.
The quest for the perfect Megroni is on!