What happens if you are over water? Can you get some horizontal speed and try to skip across the water?
I suppose hypothetically your best bet over water would be vertical entry, as opposed to the spread-eagle recommended for a land impact, but at the speeds you'll be going I imagine you're pretty much doomed regardless - even if the impact doesn't shatter you, I believe water rushes into your internal organs through your anus and causes massive damage. I've seen that referenced as a risk for bridge jumps and this is, obviously, as bad a water jump as you can make. I also imagine you'd go deep enough that you couldn't possibly float back up to the surface before drowning, and I imagine the impact and pressure of increasing depth would force all the air from your lungs anyway.
Disclaimer: I am not an expert in any relevant field. I may well have some facts wrong. Just speculating based on what little I know.
Of course, there are things you could do to improve your odds. Placing yourself near other people who might assist you would be a big one. If you could somehow make yourself float face up once unconscious that might help as well, although I struggle to see how you would do that given the colossal forces involved. Any kind of crush core would be a huge help.
The horizontal component seems like a red herring when it comes to water. Any advantage you might get from the smaller vertical component would be totally overridden by the horrible death you would suffer due to damage to your internal organs.
Anyone else remember who this group was and has some information about them?
Whether you can skip or not, the impact will almost certainly kill you.
The only question is whether your corpse will bounce and if so, whether it will do so horizontally.
The article itself talks about horizontal traversal and saris you could make as much as two-thirds of your vertical traverse horizontally.
If true, that means you can't even reach a forty-five degree descent, which I'm pretty positive would mean no skipping.
There's a fascinating story about a fighter pilot named Judkins [1] who survied a free fall above the ocean. There are other similar stories [2]. A lot of luck involved each time.