Spray a slow cooker with cooking spray. Add cooked and shredded chicken to a crockpot. Season with salt, pepper, garlic powder, Onion powder, and smoked paprika.
Add one block of cream cheese, 1/2 cup Buffalo Wild Wings Medium Sauce, and the ranch dressing.
Finally, add shredded cheddar cheese and shredded mozzarella cheese (save a little bit of the shredded cheese for topping the dip).
Cook on low for 4-6 hours or on high for 2-3 hours. Stir occasionally.
Top with the saved cheese, green onions, and a little drizzle of Medium sauce. Serve with tortilla chips, pretzels, or crackers.