In a medium mixing bowl, whisk together 3 tablespoons oil, the juice and zest of 1 lime, and 3 tablespoons taco seasoning to make the marinade.
Add the 1½ pounds of chicken breasts to the bowl and toss to coat completely in the marinade; set aside to marinate 30 minutes at room temperature or refrigerate up to 2 hours (or overnight) for more flavor.
While the chicken marinates, stir together the sauce: in a small bowl combine ½ cup mayonnaise, 2–4 teaspoons chipotle adobo sauce, 1½ tablespoons lime juice, 2 teaspoons agave, and a pinch of salt. Refrigerate until ready to use.
Heat 1 tablespoon oil in a large skillet over medium-high heat. Add the marinated chicken and cook 5–7 minutes without moving to brown, then flip, cover, and cook another 5–7 minutes until the internal temperature reaches 165°F and the chicken is cooked through.
Remove the chicken from the skillet and let it rest 5–7 minutes, then slice thinly against the grain into strips.
To assemble each torta, spread some chipotle mayo on the bottom half of a bolio roll. Top with shredded iceberg, tomato slices, about 2 tablespoons guacamole, cilantro leaves, sliced chicken, and more sauce if desired; close the roll and serve immediately.