I’ve made this drink umpteen times because it is one of my favorites and still managed to find a new combination of ingredients that are outstanding, to wit:

Plymouth Navy Strength, Dolin Blanc, La Cladedtine, and, critically, 2 dashes Fee Bros and 2 dashes Regan’s.

The NS is not recommended for the inexperienced, but it is really good here. The Feegan’s bitters are a revelation.