Slice the chicken breast into thin, bite-sized strips.
In a small bowl, whisk together the chili powder, smoked paprika, garlic powder, sea salt, and black pepper.
Toss the chicken strips in the spice mixture until every piece is thoroughly coated.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sauté for 5-7 minutes until cooked through and slightly charred on the edges.
Drizzle half of the lime juice over the cooked chicken and stir to combine.
In a separate bowl, toss the shredded cabbage with the remaining lime juice.
Warm the corn tortillas in a dry pan over medium heat for 30 seconds per side until pliable.
Assemble the tacos by dividing the chicken between the tortillas, then topping with the lime-cabbage slaw and avocado slices.