[rodi]

I wouldn't go by the exif from that image. it's only pulling from shot of the model.

compositing has been around long before Photoshop and the digital age. but if you don't have the equipment to pull it off, you might as well composite.
you'd need more than two strobes, with ND filters, modifiers and a way to trigger the flashes. the key will need to be a separate shot as well, unless you can control the spill when you key it out.

again, there are so many ways to do this. try more than one!

and the iPhone definitely has enough light for iso 1600 and up. I'll post some examples tomorrow.

have fun.