Make the dressing: In a small jar or bowl, whisk the olive oil, lime juice, lemon juice, honey, Dijon, garlic, herbs, salt, and pepper until emulsified.
Set aside.
Mix the blackening spice: In a small bowl, combine both paprikas, garlic and onion powders, oregano, thyme, cayenne, black pepper, and salt.
Season the shrimp: Pat shrimp dry with paper towels. Toss with 1 tablespoon oil and the spice mix until evenly coated.
Prep the salad base: Add greens to a large bowl. Top with tomatoes, cucumber, red onion, and corn.
Hold the avocado and crunchy toppings for now.
Cook the shrimp: Heat a large cast-iron or heavy skillet over medium-high until very hot. Add remaining 1 tablespoon oil. Arrange shrimp in a single layer.
Cook 2 minutes, flip, then cook 1–2 minutes more until opaque with a dark, fragrant crust.
Dress the greens: Drizzle about half the dressing over the salad base. Toss gently to coat.
Add the shrimp and toppings: Layer on the warm shrimp, avocado slices, and cheese if using. Sprinkle with pepitas or tortilla strips.
Finish and serve: Spoon over more dressing to taste.
Add lime wedges on the side for an extra squeeze of brightness. Serve right away.