In a small bowl, combine the chipotle powder, smoked paprika, garlic powder, sea salt, and black pepper.
Pat the shrimp dry with paper towels then toss them in a medium bowl with the spice blend until thoroughly coated.
Heat the avocado oil in a large non-stick skillet over medium-high heat until shimmering.
Add the shrimp to the pan in a single layer and sear for 2 minutes per side until they are pink, opaque, and slightly charred.
While the shrimp are searing, toss the shredded cabbage with half of the lime juice and the fresh cilantro in a small mixing bowl.
Briefly toast the corn tortillas over a low gas flame or in a separate dry skillet until warm and pliable.
Slice the avocado into thin wedges.
Build the tacos by dividing the zesty cabbage slaw between the tortillas, topping with the smoky shrimp, and finishing with avocado and the remaining lime juice.