So...
You want Messi who'll be 30 in June and Bale who will be 28 in July to join 'our' ageing squad just to keep up with a club because they are reportedly interested in signing a world class player?
Who would you leave out? Messi would demand a game, every game. Sane and Jesus alongside him with Aguero up front. An exciting front line indeed. This leaves Bale sitting on the bench with Sterling, DB and Silva. Oh wait, Aguero and Messi don't really go well together so Let's put Jesus up front and sell Aguero. Problem sorted. DB can replace him in the team. Bugger, now we still have Sterling, Spanish Dave and Bale on the bench. But Bale really has to play so let's do this...
The trouble with your nearly eloquent post is that you are playing fantasy football. We used to do the same years ago when we were a bit shit. I suspect you won't remember those days due to you not being a City fan but rather a fan of another club trying to play a crap game of "fishy fish fish".
I'm guessing Man United given your rather fanciful boasts in your profile.