this is a nice little trick I learned from a guildie in the underbog last night.
A ways in after you go up to the 2nd level and fight the first boss, there is a hut looking then you go up a path to inside which you have to clear. this room eventually has a slope to go to the next level and continue on clearing. in this hallway there is a window with weapons laying by it on the left hand side. you can jump / walk up the weapons and stand in this window in safety. your ranged is safe and if you wanted they can evade "tank" while other mobs are cleared. sorry if its a little unclear, I can post a screenshot if needed.