Was arthas Frost or Unholy?
Although Arthas as a death knight was definitely Unholy. "I call the big one Bitey." And he has a LOT of control over frost. He can walk on water (he gives that spell to us Death Knights as well) and the ground freezes over when he walks on it.
What has better DPS Frost or Unholy?
Frost dk is low mid tier. Unholy is ahead in every way for all content. It had better burst, waaay beter aoe and better sustained single target.
What is the best Death Knight DPS spec?
Although each specialization has strengths and weaknesses, we recommend Blood as the best Death Knight leveling spec. Blood has high area damage capability and amazing self-healing, and its damage is not far behind the two damage specializations. As a tank, you can often experience near-instant dungeon queues!