After (too) much experimenting, I came up with the perfect tropical rum punch.
Per drink:
1 1/2 shots dark rum
1 jigger (1 1/2 ounces) banana juice
1 1/2 jiggers mango juice
1 jigger orange juice
1/2 jigger coconut milk
Juice of 1/2 lime
1 1/2 tablespoons heavy cream
1/4 teaspoon grated nutmeg
Potato chips
Put just a few ice cubes in a pint glass. Add the rum, all the juices, the coconut milk and the lime juice. Give it a stir. Drizzle the dream on the top (don't mix in). Sprinkle the nutmeg on the cream. Must serve with potato chips.