Miraculously without any victims, but my party is realy high lvl. And i already have plenty of experience with geists (and alot of dead brothers) but i must admit this kind of enemies are the most deadly, they like goblins with daggers but worst. I can slaughter orks, snipe goblins, or steamroll bandits but the geists is totaly another thing, nets wont help, shieldwall is useless, arrows dont help much, the only thing can save you is 100+ resolve or better the undead necklace, if you have none of those just run.