1Preheat the oven to 375 degrees. Combine the cream cheese, mayonnaise, sour cream, buttermilk and flour in a large bowl. Add the worchestershire sauce, hot sauce, lemon zest, garlic, parmesan cheese and 1 teaspoon salt; beat with a mixer on medium-high speed until smooth and creamy; about 2 minutes. Add the scallions, chives, and crabmeat and continue beating until combined (may want to do this part by hand to prevent breaking up the crab meat too much if you prefer it chunky).
2Transfer the mixture to a shallow 1-quart baking dish; sprinkle with more parmesan and bake until golden and heated through, 25-30 minutes.
3Top with paprika and more chives; serve with toasted bread or crackers.