Best AP Specialty for Medical Missions

I am currently a BSN nursing student. I am committed to doing international medical missions in some capacity. After graduation from my BSN program I will be going on to complete a Doctorate of Nursing Degree/Nurse Practitioner Degree. I was wondering if anyone would be willing to share some advice on the best Advanced Practice Nursing Specialties for international medical missions work. FYI: I especially intend to work in the regions of India, Bangladesh, Pakistan, other Middle Eastern areas & Southeast Asia.

My first choices for AP:
Family Nurse Practitioner
(or)
Adult/Gerontological
(or)
Women's Health (I want to do work in the Middle East and Southeast Asia where I am aware women are sometimes more easily accepted in areas where they work with women patients, as well as vise versa)

My second choice:
Midwife

Other specialties I would be interested in getting extra training for international work:
Wound Care
OR

Areas I am considering working after I graduate with my BSN and begin preparing for graduate school:
ICU (Med, Surg, Adult)
Burn
OR
Public Health

Any feedback would be greatly welcomed! I really want to take every step well in-line with the goal of work abroad.
Thanks!