I've used all these configurations in my #Worldbuilding way back 2003/2004. The Lagrangian points and yes, even the Epimetheus–Janus configuration (Saturn's dancing moons).
It's easier to learn which configurations will work because of modern simulation software available today, one such is "Universe Sandbox ²" (paid software). There are many science fiction authors today who used this software to write a very convincing story grounded on hard science.
