¾ oz reposado tequila¾ oz blended aged Jamaican rum¾ oz lime juice½ oz falernum½ oz Don’s mix1 tsp mezcal1 tsp grenadine syrup1 dash Angostura bitters
instructions :

Add all the ingredients to a shaker and shake with one ice cube.
Pour over crushed ice into a tiki mug, then garnish.

source :
Test Pilot (Santa Barbara)