One thing to bear in mind in a SIGINT career is you're going to need to move in and out of a variety of jobs if you want to progress. The days of hanging out in group for decades are largely gone - SMUs are another matter but concentrate on your 50m target first.
SOT-A is a great assignment, but if you want to move up past E6 and/or progress to WO you need to spend time working an NSA mission. That may be at NSA-W but there are a number of other cryptologic centers and CSGs with some high speed units. In every case your ability to learn about the enterprise - the tools and skills being used from national to tactical is what is going to make you excel. A Ranger tab will get you a leg up in any competition in MI that is picture-deep (so boards will always break your way other things being equal). But, you'll find once you're face-to-face and getting evaluated you better have some technical skill or you're better off staying 11B.
It's a timing thing, but airborne qualified 35Ps going anywhere other than an airborne assignment is a pipe dream, except for some random language... and the right timing.