I like to think I'm a pretty good shotcaller, and games like this are an example of how I come to that assertion.
It started out with Leona feeding the living fuck out of Lucian, blaming the rest of the team, then afking at ~10 minutes, returning once only to call Shyvana and I fags before leaving again. Eventually Varus was 1/10, but no one else freaked out, we just kept doing our thing. I used the blue trinket to look for picks; we did a lot of baiting Kha/Lucian then bagging them so that helped get us all fed. Shyvana kept splitpushing mid-late, lulling one or two of them away at a time while Varus and I grabbed some dragons / towers; I could duel all of them except skarner (AP skarner fucking hurts!).
It all culminated into one last teamfight in mid, where the entire enemy team focused Shyvana while Fizz and I tore the real threats apart. A 5 for 1 (Fizz) ace let us take inhibitor. Varus really wanted to back off and take Baron as he wasn't sure we could close it out, but I insisted that we could do the job. And thanks to Varus, we were able to win it before Lucian got back up.
And yes, Wander, I quoted you in postgame, since with how fed Kha'Zix and Lucian were in the early game, they should have beaten us extremely easily.