Add chicken thighs to a large bowl and season with lemongrass, soy sauce, dark soy sauce, fish sauce, oyster sauce, chili sauce, minced garlic, shallots, black pepper and neutral oil. massage the
Mix and massage the chicken into the marinade until the chicken is coated. Cover and marinate for at least 1 hr. Overnight is best.
Preheat the air fryer to 380°F or the oven to 375°F. Cook the chicken for about 27 minutes, flipping halfway through. At the halfway mark, baste the chicken with the remaining marinade and continue cooking. During the last 2 minutes, baste once more, then cook until the chicken is caramelized and fully done.