FFXIclopedia is the
only source of knowlege about game mechanics and saying the pages are copy pasta from BG is retardation. A lot of pages link their source and discussion is often done within the "discussion" section of the page, after which the main page is edited in a clear way. Since you don't seem to be used to checking this side of the pages I'll suggest you to visit the pdif wiki page and visit the corresponding "talk"
here. You will see a lot of maths and tecnical considreation as well as sources of testing.
