Deviled Shrimp Tostadas

Name: Deviled Shrimp Tostadas
Ingredients: For the tostadas:; 4 corn tortillas; 1/2 cup vegetable oil for frying, or as needed; For the avocado spread:; 1 ripe avocado; salt to taste; 1 lime, juiced; 2 tablespoons minced jalapeno; 2 tablespoons chopped cilantro; For the deviled shrimp:; 8 large shrimp, peeled and deveined; 1/4 cup fresh lime juice (about 2 or 3 limes); 1/2 teaspoon ground chipotle; 1/4 teaspoon cumin; 1/4 teaspoon paprika, or other chili powder; pinch salt; 1 tablespoon olive oil; 2 teaspoons ketchup; 2 tablespoons diced red onion; 1/4 cup diced tomato; 1/4 cup diced cucumber; 1/4 cup chopped cilantro