I got Survivor Ribbon! :D
I did it in Chained Court. I took Brute as my starting trait and used the berserk pack to run through the lava and kill the two Knights. (That way, I didn't have to drain the lava) Then, I killed all the formers, being careful to leave one injured Former Human as the last enemy. Then, I very *very* carefully stepped into the lava over and over again until I was down to 2% health, then finished off the last guy. I don't know if I needed to still be at 2% when I left the level, but I didn't want to take any chances, so I passed up a Supercharge on my way out. (Which was a contributing factor to me not surviving the first round of the Arena) :P
Unfortunately, all the attempts I made at this lowered my career average below Vandam again! :o (This included attempts where I carried out the above strategy right up until the end and then stayed in the lava a little too long or got shot by the last guy; *facepalm*) I'll have to see if I can bring that up again. :)