Cook the rotini in a large pot of salted water according to package directions until al dente.
Drain the pasta and place it in a large mixing bowl. Immediately toss with 1/3 cup pickle juice while still warm. Let cool for about 10 minutes.
In a medium bowl, whisk together the ranch dressing, mayonnaise, sour cream, pickle juice, fresh dill, Dijon mustard, garlic powder, onion powder, dried dill, salt, and black pepper until smooth.
Reserve 1/2 cup of the dressing for serving later.
Add the diced pickles, shredded cheddar cheese, celery, red onion, fresh dill, and chives to the cooled pasta.
Pour the remaining dressing over the pasta mixture and toss until evenly coated.
Cover and refrigerate for at least 2 hours or overnight.
Before serving, stir in the reserved dressing and toss until creamy. Garnish with extra dill and pickle slices if desired.