Level 8 is way too low to take on that Djinn. Little Spoiler (but not much):
You want to get into the room fast with some distance between you and the Djinn. There are at least 3 spells that will prevent or hinder the Djinn from attacking you... but, at level 8 you probably do not have any of the spells available yet. btw, don't ignore putting points into certain spells when playing a warrior, you will need them later on when you have to take on lots of Liches, DragonRiders, and Black Ring members.
