Jet Pilot

Ingredients:
0.5 oz Grapefruit juice
0.5 oz Lime juice
0.5 oz Cinnamon syrup
0.5 oz Falernum
1.0 oz Dark rum (Coruba)
0.75 oz Aged rum (12-year El Dorado)
0.75 oz Dark overproof (Plantation O.F.T.D or Pusser's Gunpowder Proof are great)
1 dash Angostura & 1 dash Herbsaint/Pastis/Absinthe

Directions:
Shake all ingredients and serve over pellet ice.

Source:
Smuggler's Cove: Exotic Cocktails, Rum, and the Cult of Tiki