Orianna+Rengar+Yasuo

I'm not sure if anyone has tried this before, but in a ranked game i convinced my team to do it. I chose Rengar, my mid laner chose Orianna, and my top laner chose Yasuo. When the first teamfight broke out, I ulted, had Orianna stick her ult on top of me (it became invisible) and jumped into the enemy team. Yasuo followed up with his ult and we aced. Is this viable at all? This was in bronze so i'm not entire sure...

P.S.: I've seen the Lee sin ult buff on PBE, didn't believe it until i read it 3x. Riot is going too far this time...