In a bowl or shallow dish, combine 1 tablespoon pickle juice, 1 tablespoon hot sauce and 1/2 teaspoon salt. Add chicken and turn to coat. Refrigerate, covered, at least 1 hour. Drain, discarding any marinade., Preheat air fryer to 375°. In a shallow bowl, mix flour, remaining 1/2 teaspoon salt and pepper. In another shallow bowl, whisk egg, buttermilk, remaining 1 tablespoon pickle juice and 1 tablespoon hot sauce. Dip chicken in flour to coat both sides; shake off excess. Dip in egg mixture, then again in flour mixture., In batches, arrange chicken in a single layer on well greased tray in air-fryer basket; spritz with cooking spray. Cook until golden brown, 5-6 minutes. Turn; spritz with cooking spray. Cook until golden brown, 5-6 minutes longer., Whisk together oil, cayenne pepper, brown sugar and seasonings; pour over hot chicken and toss to coat. Serve with pickles.