This quest took me several attempts. It presented the first real challenge of the game for me. The champion by himself is difficult to slay however he is surrounded by numerous orcs with various abilities.

Use your surroundings, there are caragors that can be dominated and will help you stay mobile while you mow down your enemies. I lost my caragor early so I had to improvise. Run away when your health is low, try to sneak a stealth drain from behind on a lower level enemy and stay in the fight.

The key to this quest is patience. Took me three attempts to complete but it's possible.