Preheat the oven to 400ºF.
Brush 3 tablespoons of avocado oil onto 2 cookie sheets and lay 4 tortillas onto each sheet.
Sprinkle about ¼ cup of shredded cheddar onto each tortilla. Place the baking sheets in the oven and bake for 3 to 4 minutes. The cheese should be bubbling and the bottoms of the tortillas should be golden brown and crispy. Set aside for later.
Prepare the burger patties. Separate the ground beef up into 4 balls. Press each ground beef ball into thin patties that are about 5-inches round. Season each patty with salt and pepper.
Heat a large skillet over high heat. Add the burger patties to the skillet and cook for 3-4 minutes on each side.
Place 2 slices of pepper jack on each burger patty and cover for 30 seconds to allow the cheese to melt. Remove the patties from the skillet and keep them warm.
Place already cooked pieces of bacon into the skillet a minute before you are ready to assemble to make sure they are warm.
Next, in a small bowl, mix together the ranch, salsa, and taco seasoning. Set aside.
To assemble, lay one tortilla crispy-side down. Add ¼ cup of the shredded lettuce and 2 tablespoons of pico on top of the melted cheddar. Then, add a burger patty and 2 slices of bacon onto the lettuce. Top with 2 more tablespoons of pico. Drizzle 1 tablespoon of Mexi-ranch on top of the burger, then top with another tortilla.
Serve immediately.