As the lazy person I am, i have a mix of Focus and FTL. I have made it so that the focus ( aka main) is switching when i go to another window and push follow. This is because i dont need the focus for something atm, and i dont have to rewrite a single macro to utilize it. I need to set up just one string ( per character) and im all set, instead of the immense job of implementing the big macros for every spell. It is also easier to create new macros to new spells.