Classic Milk Tea

Name: Classic Milk Tea
Ingredients: 1 cup (213 grams) dark brown sugar, packed; 1 cup (198 grams) granulated sugar; 1 cup (227 grams) boiling-hot filtered water; 4 cups filtered water, plus more as needed; 1 cup (168 grams) dried boba balls; ½ cup Sweetening Syrup; ½ cup (28 grams) loose Assam black tea leaves; ¼ cup (14 grams) loose Ceylon black tea leaves; ¼ cup (14 grams) loose Yunnan black tea leaves; 4 oz. (by weight) ice cubes; 5 oz. filtered water, heated to 190ºF; 2-4 Tbsp. toppings of your choice (optional); 5 oz. (by weight) ice cubes; 2 oz. Sweetening Syrup, or to taste; 1 cup Brewed Black Tea Blend; 2½ oz. (¼ cup plus 1 Tbsp.) half-and-half or your dairy-free milk of choice