Set a large skillet over medium heat with the butter. Once hot and melted, add the onion, celery, carrot and garlic. Cook until the vegetables have softened, about 5 minutes. Add the ground chicken and cook, breaking up with a wooden spoon, until fully cooked through and just starting to brown, about 8 to 10 minutes.
Stir in the buffalo sauce, salt, pepper, garlic, onion, paprika, and chili powder. Cook over low heat until heated through and barely simmering. Turn off the heat and stir in the Cheddar cheese. Allow to cool slightly.
Warm the tortillas in a skillet or in the microwave just to make them pliable. Fill each tortilla with about 2 tablespoons or so of filling, roll tightly and secure with a toothpick. Place half of the taquitos in a single layer in an air-fryer. Spray with cooking spray and cook at 400°F for 6 to 9 minutes. Turn over and cook for another 3 to 5 minutes. Transfer to a plate and cook the second batch.
To assemble, drizzle the taquitos with buffalo or ranch. Top with lettuce, tomato and crumbled blue cheese. Serve immediately and enjoy!