01 - Whisk together mayonnaise, sour cream, buttermilk, dill, chives, parsley, garlic powder, onion powder, salt, black pepper, and lemon juice in a medium bowl. Cover and refrigerate until serving.
02 - Arrange three shallow bowls: place flour in the first, whisk eggs with buttermilk in the second, and combine panko breadcrumbs with paprika, garlic powder, cayenne, salt, and black pepper in the third.
03 - Working in batches, dredge each pickle slice in flour, shake off excess, dip into the egg-buttermilk mixture, then press firmly into seasoned panko breadcrumbs to coat evenly.
04 - Pour 2 inches of vegetable oil into a deep skillet or Dutch oven. Heat to 350°F, maintaining temperature throughout frying.
05 - Fry pickles in small batches for 2 to 3 minutes per side until golden brown and crispy. Avoid overcrowding the pan to maintain oil temperature.
06 - Remove fried pickles with a slotted spoon and transfer to a paper towel-lined plate to drain excess oil. Serve immediately with chilled ranch dip.