Prepare salsa by combining mango through lime juice in a small bowl. Prepare cilantro crema by combining Greek yogurt through lime juice in a small bowl. Set aside both.
Prepare spice rub for fish: in a small bowl combine cumin through cayenne, rub all over fish. Season fish with salt and pepper. Grill on outdoor grill set to medium heat for ~3 to 3 1/2 minutes per side or until opaque and cooked through (depending on thickness of fish). Remove from grill and cut into chunks.
To serve, warm tortillas for a minute on grill or for a few seconds in microwave. Place chunks of fish along center of tortilla and top with slaw, some mango salsa and cilantro crema. Serve with line wedges and hot sauce.