Instead of testing your luck with raids or ToO you could be able to buy damage modifiers from Xur. Of course, by far raids weapons will always have precedence, but this would give other weapons more of a chance to be used. Another idea I've been working on, and I'll post later on it, is a long and complicated process to turn rare weapons into legendary. Face it, you're as tired as I am with getting am unlimited number of rare weapons and armor that you really just dismantle almost immediately.