Ok, so I got to the boss fight with a party of Myself, Heroes and Henchies.
But then i just got my ass kicked by the Kournan Bowmen who hit constant 100s from above... Anything i could do to avoid them?
You got mangled on the bridge? Tried to pull, perhaps?
Ignore the archers and run past them into the big open arena where the Hunger and wotshisname are waiting. For some reason the archers don't seem to attack there, or at least it's not the same hail of death as on the bridge outside.
i agree with the running past to the open area away from the archers, it's worked for me every time. my henchies/heroes like to wander off and get themselves killed, so i don't usually do the under the bridge. if all else fails, maybe bring the winds spirit from the ebon vanguard track and shields up warrior skill.