In a large bowl, combine 4 cups of shredded chicken with 1 cup of homemade enchilada sauce. Stir in garlic powder, onion powder, dried parsley, dried chives, dried dill, and season with salt and pepper to taste. Mix until chicken is evenly coated.
Gently warm 12 soft white corn tortillas in a dry skillet or microwave wrapped in a damp towel to make them pliable. Use taco holders or shape tortillas around crumpled foil balls and arrange upright on a baking sheet.
Evenly divide the chicken mixture among the tortillas, filling each generously. Sprinkle about 2 cups of shredded cheese over the chicken filling.
Preheat oven to 400°F (200°C). Bake tacos on the baking sheet for 10-12 minutes or until tortillas are crisp and golden and cheese is melted and bubbly.
While baking, mix 1 cup sour cream or plain Greek yogurt with 2 tablespoons lime juice, 1-2 tablespoons milk, chopped cilantro, and salt and pepper to taste. Stir in chopped pickled jalapeños if desired.
Remove tacos from oven and let cool for a minute. Drizzle or dollop with creamy lime sauce and add any favorite toppings like chipotle sauce, guacamole, or pico de gallo. Serve immediately.