Combine first 5 ingredients in a small bowl; set aside.
Combine paprika and next 6 ingredients in a large zip-top plastic bag. Add shrimp to bag; seal and shake well to coat. Remove shrimp.
Heat a grill pan over high heat. Coat pan with cooking spray. Add shrimp; cook 2 minutes per side or until done.
Working with 1 tortilla at a time, heat tortillas over medium-high heat directly on the eye of a burner for about 15 seconds on each side or until lightly charred. Divide shrimp evenly among tortillas; divide tomato, avocado, and sauce evenly among tacos.