You're not actually going to be more productive with a different window manager. You may feel more productive, but it's highly unlikely that how quickly you switch between windows is an actual bottleneck in your life.
My productivity is about the same, since I use the same applications. The only thing I don't have is an incessant need to fiddle and tweak.
My dotfiles repo is private but here is mine: https://gist.github.com/simonacca/425dad70526bcfd9c6af7ed5f4...
Arch wiki is useful. Also https://faq.i3wm.org and https://www.reddit.com/r/i3wm/