Blend the 2 rums and the mango in a blender to form a smooth paste. Pour this mixture into a hurricane or collins glass. Rinse the blender. Blend the banana, the coconut cream, and the pineapple juice in blender with crushed ice until smooth. Pour this mixture into the glass with the rums very slowly and watch as the mango mixture oozes its way to the top along the sides of the glass creating the flowing lava effect. Garnish with a pineapple wedge and umbrella.
Combine the simple syrup with lime juice and mint in a blender. Pulse several times to combine. Add ice and pulse until ice is finely crushed and mint is chopped into tiny flecks, giving the drink a light green hue. Pour into a hurricane glass or a collins glass, add the rum and garnish with mint sprigs and slices of lime.
Put the ice, frozen pineapple, juice, and coconut cream into a blender. Blend until smooth and frosty. Pour the drink into a hurricane glass or a collins glass, add the white and dark rum and garnish the rim with a pineapple slice.