The difference a little defense makes
A bit of background to this game: I wanted to troll with full glass cannon AP Sona, it was ARAM so I can do that. Full AP Malphite 1 shotting me all game from 100 to 0, obviously with the help of a very very fat DH as you can see by his score. At level 18, even when my HP was capped, I was still getting 1 shot from full HP.
Then the very very last fight, I just got a null mantle, not for the MR but so that I could block his ult to ult back at their team. I never completed it but as you can see in that fight, 1 null mantle allowed me to survive the 1 shot with that little bit of HP for my team to tear him a new one. Just a little something to think about, you glass cannon aficionados who complain about 1 shots. That was an incomplete component item, a completed Hourglass, GA, Maw, Wits End can potentially end the ability of an assassin to 1 shot. In this damage meta, 1 shotting and near 1 shotting makes a very big difference because you either get 1 shot, or you get counter 1 shot.