Sorry but I just really don't see the Yankees keeping up with the Sox, Rays, or Orioles over the next few years.
The Yankees rode a dominant 15 years on the tail of Jeter, Pettitte, Posada, and Mo. Guys that were lifers other than a year with the Astros for Pettitte.
That era is officially over. You can go out and sign all the big name players you want but it doesn't work anymore. Look at the Blue Jays, Marlins, Angels. The way to long term, sustained winning is by building from the core and complimenting those pieces.
As much as the sabermetricians hate to admit it, chemistry is a real thing. You can't just go sign a bunch of aging veterans and expect to win 93+ games.
And the Yankees have ARod, Tex, CC on the books being incredibly overpaid.
The Yankees needs: 3B, SS, 2B, RF, C, 3 SP, 2 RP, Bench.
The Yanks have Mason Williams (who had a disgusting year between A+ and AA), Gary Sanchez, Slade Heathcott (pretty down year, certainly not a big prospect type year) and that's about it. We will see on ManBan how he recovers from TJS.
And now, with all of the free agent albatross contracts and underperformance (Crawford, Hamilton, Pujols, Fielder, etc), teams are locking up talent early via extensions, so it's nearly impossible to build a contender without a huge core of talent on the team already.
Meanwhile, the Sox are loaded with talent both at the core and in the minors. Bogaerts, Bradley, Cecchini, Betts, Barnes, Ranaudo, Owens, Ball, Swihart. The Sox could easily have 6 top 50 prospects and 9 top 100 prospects. The Rays and Orioles also have significant talent in the minor leagues.
Point blank, the Sox, Rays, and Orioles all have better teams than the Yankees right now, and have much better farm systems than the Yankees have. The only advantage the Yankees have over these teams is the ability to spend, but with the trend of the MLB turning from big-name FA signings to locking up talent early, the FA market is as dry as its ever been.
Sorry, Jacko, the Yankees are in for a massive, massive demise and a ton of 3rd place or lower finishes over the next 5+ years.