In a small bowl, whisk together the chili powder, smoked paprika, cumin, sea salt, and black pepper.
Pat the shrimp dry with a paper towel and toss them in the spice mixture until every piece is evenly coated.
Heat the olive oil in a large non-stick skillet over medium-high heat.
Add the shrimp to the skillet and cook for 2-3 minutes per side until they are pink, opaque, and slightly caramelized on the edges.
While the shrimp cooks, thinly shred the cabbage and toss it in a bowl with the lime juice and chopped cilantro.
Warm the corn tortillas in a dry pan or directly over a low gas flame for 30 seconds per side until charred and pliable.
Slice or mash the avocado and spread it onto the base of each warmed tortilla.
Top the avocado with the zesty cabbage slaw and the smoky sautéed shrimp.
Finish each taco with a dollop of Greek yogurt and an extra squeeze of lime if desired.