I hear you. The best team I've been in was a rails core dev, me and a trainee with a good portion of modern frontend skills. We build amazing (boring) software

I hear you. The best team I've been in was a rails core dev, me and a trainee with a good portion of modern frontend skills. We build amazing (boring) software, I am sure most of it still in use even thought they don't do rails anymore when our team split away. I think that is also the general idea. You only need one or two expensive rails guys and some other people who don't find MVC weird, willing to learn, to setup a proper efficient team for any project.