Heat the oven to 400°F. Toss strips with 1 tablespoon oil and a pinch of salt, spread out and bake 8 to 12 minutes until crisp.
Heat remaining oil in a pot. Cook onion and jalapeño for 6 minutes, then add garlic, cumin and chili powder for 30 seconds.
Add tomatoes, broth, remaining salt and chicken. Bring to a gentle simmer, cover partially and cook until the thickest chicken reaches 165°F.
Transfer chicken to a clean board, rest briefly and shred with forks.
Return chicken with beans and corn; simmer 5 minutes until everything is hot. Stir in lime juice and cilantro.
Taste for salt, rest 5 minutes and ladle into bowls. Add tortilla strips only at the table.