Max Shutter speed
Fujifilm X-Pro2 can shoot continuously at max speed of
8.0 fps and has max shutter speed of
1/8000 sec. X-Pro2 also has an electronic shutter which can shoot silently at max speed of
1/32000s. One thing to keep in mind is that electronic shutter may cause rolling shutter / jello effects, and also banding issues under artificial light on your images.
Flash
Unfortunately X-Pro2 doesn't have a built-in flash but it has a flash shoe for mounting external flashes.
Focusing
Fujifilm X-Pro2 features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 273 points to choose from. Fujifilm X-Pro2 also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.