I would personally look more at hours. Grimoire sometimes means experience since it can take awhile to get. Except if you focus mainly on grimoire and therefore, can slow down the lengthy process of acquiring mac grimoire. People will say KD matters; that shows skill. You can go play one game, do absolutely fabulous, and that's it. That's your KD. You judge skill by actual skill; in-game, in the "heat" of the moment.