For Ref: Wiki details on the Kurg King
https://www.exiledkingdoms.com/wiki/ind ... =Kurg_King
The Kurg King is tough. You might need to come back in a few levels when you're a little stronger. No shame in that (wait to you find the King of Korne).
The Kurg King is resistant to all elements except Death, a common theme for beast men in the game. That poses a challenge for magical attacks that tend to be element based. Getting the Tolassian Greatstaff from Azagul Tomb might be helpful. You might be ready to get the Staff of the Dead Kings from the Royal Crypt, but you'll have to fight a pretty strong lich to get it.
If you have the spare gold, summon scrolls might be helpful to keep the Kurg King busy. I'd suggest ice golems as their higher defense will keep them in the fight a little longer. If you've learned the summon skill, that could help too.
Potions of all type can help. Might consume more resources than the fight's worth but drinking potions like a madman can increase your durability a bit.