Tbh, Heim was the least of my worries. All throughout the game, I've been weary of Rengar ganks (thus the lvl 9 pink trinket), man drops from the super fed Panth, and a gang bang from bot lane. Heim was 1/2 while I was 1/1/1 and I had more cs than him even before Shiv. I learn quick with Yas, and it seems like when I just play a match up once, I know what to do.
It's probably because I'm not afraid to make mistakes I can learn from