Heat the olive oil in a large skillet over medium-high heat.
Pat the mahi mahi dry with paper towels and season evenly on all sides with the blackened seasoning.
Add the fish to the hot skillet and cook for 3–4 minutes per side, or until the fish is opaque, flakes easily with a fork, and has a lightly blackened exterior. Remove from heat and break the fish into large chunks.
While the fish cooks, prepare the sauce by stirring together the mayonnaise, Cajun seasoning, paprika, honey, capers, and chopped cilantro until smooth.
Warm the tortillas according to package instructions.
Assemble the tacos by filling each tortilla with blackened fish, coleslaw, and pico de gallo. Drizzle with the sauce and serve immediately.