Just like to quote Embury about his 3:1-ish simple syrup. Making a 8:2:1 Daiquiri with his recommendation below in mind will make us a quite sweet drink. In which case a tend to prefer my 8:2:1 with a 2:1 simple syrup. "The object in determining the ratio of sugar and water is to make the syrup as heavy as possible without getting later crystallization. I have found that a mixture of about 3 cups of sugar to each cup of water yields a very satisfactory syrup. Add the sugar to cold water in a saucepan, heat it, and allow it to boil vigorously for a few minutes. " - David Embury, The Fine Arts of Mixing Drinks