Grimoire is more of a measure of how much time you've spent on this game & how one sided a gamer you are, to have spent so much time on one game. I know plenty of people with ridiculously high grimoire, and they're not elite at Destiny. They're usually pretty good at trials because they're really organised, but as far as individual skill goes, they're nothing special. And when it comes to other games? forget it, they're scrubs. I have two PSNs with grimoire split over them but even so I just cannot be bothered to go farm stupid things I need to, to achieve a higher grimoire... like who gives a f*ck about that? I prefer to be good at all the games I play.