This makes about 4 tall drinks.
7 oz spiced rum
3.5 oz coconut rum
7 oz pineapple juice
2 oz guava nectar
8 oz orange juice (homestyle - ie. with pulp)
6 or 8 solid shakes of Angostura Bitters
1 oz dark rum
6 or 8 chunks of fresh pineapple
If you're being fancy, save the dark rum to the end. Fill the glass 3/4 with drink and 3 to 5 ice cubes. Pour a little grenadine down the side of the glass to layer on the bottom, and float a little dark rum on top. I can't be bothered, and just mix the dark rum in, skipping the grenadine 'cuz I don't like pink drinks.
Some people have crappy paper umbrellas, and stab the pineapple chunks with them. I don't. I just throw a couple of chunks of pineapple in the glass at the end. My guests can eat the infused pineapple when they're ready for another. :)