Melt butter in a pan over medium heat, then whisk in hot sauce and garlic powder.
Add shredded rotisserie chicken to the pan and toss until fully coated in Buffalo sauce.
In a bowl, mix Greek yogurt (or sour cream), lime juice, olive oil, salt, and pepper. Toss with coleslaw mix.
Warm tortillas on a dry skillet for about 30 seconds per side.
Fill each tortilla with Buffalo chicken, top with coleslaw, crumbled blue cheese, and sliced green onions.
Serve immediately with a side of ranch or blue cheese dressing.