Ok the guy you want to kill is easy, he's on the first floor as soon
as you enter befallen, but yeah I would suggest taking a tank friend
with you, that or a mage/necro who has a pet that can dish out
damage. But don't worry about the lower parts till later on when you
want XP or just want to futz around in the place. You mainly want to
focus on the first floor, in the main all area by the skulls with the
glowing eyes. right infront of that cave area (if you can call it a
cave even =/...) is the mob you want to kill, if he's not there, just
keep killing that mob in that spot till he spawns. btw don't worry
about the doors too much nothing much behind them unless you're bored
and want to kill some necro's (human/gnome so far that I have seen)
killed that skeleton mob many times trying to bring up my pick lock
at lvl 52 LOL. 150 lvls in 5 hours! WOOT LMAO *sighs* no life in
picklock at that moment in time. you can't kill the sir
whateverhisnameis I tried to already, you can only kill the mob that
spawns him. hope this helps well peace out and good luck.

Taqard Tacticz 54 Dwarven Rake of the Rathe
"Let's kill them all!! Let no life be left alive!! Then let us DRINK
TO OUR VICTORY!!!"