What I did in this room was:
As soon as the dialogue with Theyliron(?) end, I drunk a shadow potion and run to the south/southwest part. There is a Conjurer Lord(Or something like that). It summons conjurers. I killed it with meteorstrike(Being a mage) immediately.
After it is killed no more conjurers will be summoned. Then advance through the northern door by killing monsters one by one. Be sure to target conjurers first, though.
I really suggest you to clear this room by yourself for the sake of exp gained.
