Place all these spices in a motar and pestle:
4 tsp paprika
1 tsp dried basil
1 tsp dried oregano
1 tsp dried thyme
0.5 tsp salt
1 tsp white sugar
0.25 freshly ground black pepper
0.5 tsp crushed chili peppers
0.5 tsp cayene pepper
Change up the ingredients to suit your tastes or make double to handle more fish filets. The amount above will cover about 4 large filets. If you keep the ratio of paprika to any other individual spice at 4:1 it will work great.
Crush and mash all the spices together with a motor and pestle. This increases the surface area of the spices and helps release more flavor, but isn't required for success. Mash the spices until they look like the image.