Does the D800 have 60p - I dont think so!
60p is quite good but not super slow motion.
With a large sensor you big issue will be focus control IMO (if you want a tight framing)
The FS700 is the prime candidate for this shoot, on a budget
My Fs100 mainly at 60p with a nikkor 70-200
Watch the focus on the last shot and imagine that the action is moving twice as fast and it is at 2.8..https://vimeo.com/51875418