Alright, so I usually never use Vincent...but I've been doing a 100% runthrough of FF7 when I found it on my PSN account still, and I've felt bad for not using him. XD
I'm going into the Mythril Cave (I believe that's the name, it's between the Choco Farm and Fort Condor), and using Slash-All there to rack up killcount for his death penalty.
Sad thing is...after an hour I'm up to about 1.5k average damage, on enemies with extremely low defense.
How many kills do you think I would need to hit a consistent at least 7k+ damage with Death Penalty? Otherwise I don't see a point to doing this.