Your question is a little confusing. I'd go with boto because it is the most stable. All the other libraries are kinda second-rate.
As for choosing an SDK because you want to familiarize people with a language I think you're looking at it the wrong way. That's not something you should be optimizing for. You should be optimizing for how the tool fits the problem you are trying to solve. Programmers are used to learning a new language and framework pretty much every other week so choosing node because it will help your new hires learn JavaScript is the wrong reason to do it. They're gonna learn JavaScript on their own or they know it already.
