I'll sort of disagree from a different viewpoint.
1. Academically; ALL academies are roughly the same in level of difficulty. So; if they "Struggle" through one, there's a good chance they'll struggle through all.
2. No matter what career you choose from the academy, they are ALL subject to a RIF. I've seen it with pilots, comm officers, intel, scientists, engineers, etc.... None of the career fields are "Future Proof".
3. The military WILL get their 5 years minimum out of an academy cadet. So you're not going to be rif'd prior to that.
4. If you aren't currently at the academy, then you are talking about a very MINIMUM of 9 years from now, before you have to worry about even being considered for a RIF. 9 years!!! That's 3 more presidential elections. A guaranteed totally different economy.
So; I only consider thinking of future Rif's as a valid question, if the individual doesn't understand politics, economics, or international affairs. Economic cycles roll every 7-8 years. Been doing so since the great depression. In my 21 years in the military 1978-1999 there were varying degrees of Rif's, career restructuring, build ups (Where they paid you bonuses to stay in), etc...
In a nut shell; there isn't one possibly thing an individual can foresee about the military for 9 years into the future. It's just not possible. Hell, the Mayans could be right, and there's less than 2 years left anyway. Point is: You're talking about 9 years into the future. Anyone who thinks they can future proof their military career by deciding today which academy to attend, is actually doing themselves a major disservice. If they have the opportunity to choose which academy to accept an appointment from, then as hornet said, they need to pick the one they really want to serve in, for the job they want to do. Trying to "Count Cards" like you're in Vegas, is not a valid method.