I use 009-042 on everything electric solidbody, keeps things simple when buying strings, and I can get any gauge to work on darn near anything regardless of scale. My acoustics usually have 12-13s.
As for Squier, I do think a Squier Stang would sell pretty well. I know I'd buy one if not a few depending on price ($350 and lower I'd buy more than one so I could do mods and stuff). I also for years have wanted to see what a Squier Jaguar or Jazzmaster would be like. If they did a Squier stang, it would open up the door to the Jaguar as they could use the same neck on a Jaguar model, and the Jazzmaster could use Affinity Strat necks with a CBS Jazzmaster style logo.