Mighty Mai Tai

6 ounces light rum
4 ounces dark rum
3 ounces fresh lime juice
1 ounce grenadine
6 ounces mango juice
6 ounces guava nectar
6 ounces pineapple juice

Pour all ingredients into a pitcher half-filled with ice and stir.

Serve in tall Collins glasses or tiki glasses with orange-cherry-pineapple garnishes.

Serves six.