Shake with ice, double strain into chilled cocktail glass.
Fontbonne is a green herbal liqueur, more delicate in flavor than green Chartreuse, and minty, but less so than some herbal liqueur Chartreuse substitutes.
I prefer the somewhat mellower Maraska Maraschino to Luxardo.
The original Closing Argument from ~2010 was equal parts Mezcal/Green Chartreuse/Maraschino/lime juice. Some newer recipes use tequila.
While searching for cocktails that use Fontbonne liqueur, I came across Chilled Magazine's modified Closing Argument--which is a variation of the Last Word. Rather than using the equal parts formula which I often find both a bit too sour and too sweet with too much maraschino; I dialed the lime and maraschino back so the tequila and herbal liqueur would stand out. In keeping with the legal theme, I considered this a "Negotiated Settlement" to the Closing Argument/Last Word.