I'm sorry but I don't grasp the concept of this picture. A small write-up would help. Since you are using 2 strobes to light up the subject, you should have metered the sky instead of getting it overexposed. Be careful of the flare too.
I've tried metering the sky, but then it would make the background underexposed so dark that you won't be able to make out what exactly are those. that was when i decided to average meters from the sky and background.