SC S10: Senna Top-lane/ It Work?

My first time Senna in Summoner Rift. I did a few clip video b/c the rest is farming and red team surrender at 20.

As you watch the video, I question, how can I clean Garen with less damage from Senna ability? Lure him to turret then last embrace to finish him off? I know where Garen hid and wasn't positive it would work.

As for Rengar, he clean up really good. I be caution when he's coming with or without vision. (He wipe my entire team while I chill top lane with Garen.

Rengar: "unward?"
Me: xD

The last part was my favorite one. It's seem I knew something going to happened next.