How sure footing would one have if one decided to make the fights in his/her RPG similar to that of Final Fantasy?

I know you can't copyright game rules, but I don't really know if Square Enix pays much attention..
could someone give me a few examples of other games/companies that have used this kind of system withouth reprecussions?
The core ideas I wanna take is the "Attack, Magic, Item" menus and the submenus, targeting and how the attacks play out.

I know you can't copyright game rules, but I don't really know if Square Enix pays much attention..
could someone give me a few examples of other games/companies that have used this kind of system withouth reprecussions?
The core ideas I wanna take is the "Attack, Magic, Item" menus and the submenus, targeting and how the attacks play out.