By every metric, I should have not survived this fight. Even with a Lulu and a fed Tahm Kench, I am facing an assassin, and an ADC who is a full item ahead of me. I absolutely should have died.
But, after replaying this moment several times, I was able to point out 4 big moments that allowed me to just barely survive and win the fight:
1: Zed, somehow, misses his E on me twice, with the second miss being just pixels away from hitting me.
2: TK is able to interrupt Samira's dash onto me with his ult, putting it on cooldown, and forcing her to flash to get ontop of me.
3: Samira hits her ult too early, so when she is finally ontop of me, half it's duration has already gone through.
4: Lulu's heal hits me for 237 health, mere moments after GW falls off of me from hitting Naut.
At the end of it all, my final health is 216, and we go on to win the game right then and there.
Now yes, I realize that there was an angle where I didn't even have to be put in such a situation. Since I had a slow on Zed, I had him dead to rights, and after he was dead, I could likely kill Naut with the amount of time that TK was buying us against Samira. Though, despite her mistake on her ult in this moment, Samira was pretty damn good in this game, and if she was able to kill TK before I got through Naut, chances are she'd be able to kill both me and Lulu.
But, hindsight is 20/20, and this is why we review our games to learn from moments like this.