in single player, not really. This game was built with multi in mind, so that's why they added better mercenaries. My merc is a barbarian with a huge amount of hp so he can distract them while I fire ice orbs or whatever at a safe distance. Of course I haven't given him the best gear yet, but once I do he should be able to kill some hell men more effectively. My sorceress is multitalented, and I built her with single player hell mode in mind. While other builds only specialize in two skill trees, I specialize in three, so not all skills are going to do massive damage. The game is getting a bit bland with the constant ice orb spamming though. That thing fires 20 ice bolts in one shot and deals massive amounts of damage when it explodes, so it's not hard to see why it's so overpowering.