Heat a cast-iron skillet over medium-high heat and add the vegetable oil. Mix together the chili powder, cumin, garlic powder and salt in a small bowl. Sprinkle the chicken breasts with half the spice mix. Add the chicken to the skillet and cook, flipping once, until done in the middle, about 9 minutes total. Set aside to cool, then shred.
In a large bowl, mix together the ricotta, Monterey Jack, parsley and the rest of the spice mix.
In a lasagna pan, pour in a little of both enchilada sauces. Add a layer of 4 noodles, spoon on half the ricotta mixture, sprinkle on half the chicken and pour on a little more of both enchilada sauces. Add another layer of 4 noodles and repeat, ending with a layer of 3 lasagna noodles, the rest of the sauce and the Cheddar on top.