Mix paprika, black pepper, cumin, coriander, loomi, sumac, cinnamon, cloves, nutmeg, green cardamom, and black cardamom together to make baharat spice mixture. Set baharat blend aside.

Combine cilantro, 2 tablespoons olive oil, and lemon juice in a resealable plastic bag. Add 1 tablespoon baharat blend. Add chicken pieces, seal, and shake. Marinate in the refrigerator at least 4 hours.

Meanwhile, place rice in a large bowl and cover with fresh water. Soak at least 1 hour. Rinse and drain and return to the bowl. Add cashews, almonds, raising, and pistachios. Stir in 1 tablespoon baharat blend. Mix well and set aside.

Preheat the oven to 375 degrees F (190 degrees C).

Heat 2 teaspoons olive oil in a Dutch oven or tagine over medium heat. Add shallot and cook until translucent, 1 to 3 minutes. Turn off heat. Add rice mixture and toss to coat.

Remove cilantro from the bag with the chicken. Pour marinated chicken on top of the rice in the Dutch oven; reserve bag. Pour broth into the bag and shake gently; pour over the chicken and rice. Cover Dutch oven.

Bake in the preheated oven until rice is soft and chicken is no longer pink in the center and the juices run clear, about 75 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).