What level are you?
If you are not at least level 4 or 5, go clear out some goblins, etc, around town, explore everywhere you can reach, and finish a few more quests first.
A summon can help, at least as a distraction. From what I've read, the demon is the best for combat; the ghost is also popular, but doesn't necessarily heal you when you want it to.
A ranged attack may work better (hit and run), with a bow or magic (ie Fireball).
Do you have any temporary boost potions you could use before the battle?
Welcome to the forum.
