PRF-style narratives tend to work the best. A few lines on why you want to be there & why they should want you there, with the bulk of the lines being your very best strats & OPR bullets to date.
The last few successful examples I saw had all the strats up front in the top few lines. I had seen ones in years previous with all the strats down the left side.
Good luck!
ETA: keep checking myPers for the most recent PDSMs (I have the page bookmarked). If you scan for it daily, you'll probably be ready before your execs send out the spam email. The candidate criteria changes every year, based on who they want to cherry-pick, so give it a solid read-through.