Not really... no. If you have some uber gear stashed some builds can take down the Kobold Chief at level 10(or earlier!)
But, as a first try, I think you did pretty good; you killed him! Most peeps run from that guy the first time around when they realize how fast he heals
Well I did run away the first time yelling Holy Hannah!. So I researched and saw it is just a long fight no matter what. So I loaded up on potions and went back for the kill. I'm learning.....about halfway through the fight I figured out what CAs to use exclusively and to ignore the others. Fight probably would have taken half the time if I had just done that from the start. I don't really ahve any uber gear yet...as this is my highest level character.