There are a few exploits in karrundex. 1st starting at the first boss. You used to be able to jump to the pillar and land on it where the boss would then suicide into the lava don't know if it was fixed yet. But you can also have one person initiate the fight with the boss and lure the boss to the ledge where a cw sneaks up and uses and oppressive force pushing the boss into the lava killing her.
2nd boss there is a rock on the right of the boss where the cw's and range can climb to in the right. Doing this will make them immune to all the ads aoe red on the ground. Only thing you have to worry about is the fire golem it can knock the wizards off the rock.
Dunno if this been fixed but on the final boss fight right before entering on the right there is a while column you can jump climb and eventually get into the fight. But doing this it lets people die and re-enter the fight through the same method and join the party again fighting the boss.