EDIT: I just remembered that I should probably start with saying that this has spoilers for The Final Empire
This game was competitive with me (Kelsier), @The WorldHopper Taynix (Vin) and @Emperor Comatose (Marsh).
All of us started going for the Luthadel Rooftops mission track to get as much training as soon as possible. Marsh picked up Balance early on, but only used it like once several turns later. I got Maelstrom and Ruin, which made the other two start to team up against me. After an attack that did 14 damage, Marsh was dead, leaving just me and Vin. Vin used a lot of damage and healing cards, but I was able to use copper cards like Coppercloud and Hide (I think that's what it was called?) to block the damage. I survived with 1 health. I got him down to 6 on my next turn, and I thought I was dead for sure until it turned out that Vin could only do 4 damage that turn, and I had more than enough copper cards to block that. So, with 1 health, I was able to burn atium and steel and win the game.