Originally Posted by
Shinzoku
I never said it was absolutely required but I will concede your point. I just like eliminating as much RNG as possible, which RS certainly is. Since most of these 4* recipes are heavily reliant on using ToT whenever possible (unavoidable RNG unfortunately), you should "potentially" get back more than the 45 CP you are saving from using RS.
As with all crafts, there are always going to be multiple rotations, and 4* crafting is about reacting to what you are given. Also, I like to throw in at least 1 WN I, which I'm sure not everyone does. Ultimately, whatever works for any given person is what they should use :)