I think people are understanding CrazyTrainxx's comment wrong. He's complaining the drain is damaging the opponent's for 0.8% of THEIR hp, when the skill means that the enemies should be taking 0.8% of YOUR hp as damage per second.
Beat mission 15 in Alien Campaign at exactly 4:01. And it wasn't me who did the last kill, it was one of my partners. I literally jumped out of my seat in happiness that they weren't completely worthless for once.
I think the Lasting Legacy badge should be made into an impossible badge. Mainly because yes harder is very beatable with skill, but at any moment bad luck can make everything crash down...
Read the tooltip more carefully.