https://www.warlight.net/MultiPlayer?GameID=3419773 beating brisk and dreuj in a 2v2 that turned into a 2v1. This was when I was kinda nooby and so was JSA. We were so proud to have beaten brisk and dreuj to begin with, let alone do it like this.
I would also say Apex winning 2 seasons in a row on clan league has been incredibly satisfying.
I remember when I joined Apex there were people outside of Apex who doubted I belonged. At no point in Apex did I ever feel like I didn't belong. Everyone in the clan is awesome and really have had a blast with them ever since I joined. It's really satisfying to join a group and immediately be accepted.