Add spiced rum, coconut rum, pineapple juice, lime juice, blue curaçao, and simple syrup.
Shake well for about 15 seconds until the shaker is very cold.
Strain into a tall or hurricane glass filled with fresh ice.
Garnish with a lime wheel and a maraschino cherry. Serve immediately.
Notes
Adjust sweetness by adding or omitting simple syrup. For a lighter highball, reduce rum and add a splash of soda water. Fresh lime juice keeps the drink bright and balanced.