Are you trying to imply all casters kite? That would be an absurd claim if you ever played the game. That's not what I am saying or ever said, at all.
If they have frost nova and frostbolt, they might have the behaviour where they space themselves from you before casting again.
If they don't have frost nova and frostbolt, they won't be doing any of that. Because they don't have anything to root you and give them time to space themselves. So they would just do like they normally do and stand there casting spells on you.
I just linked you comments back from early 2007 talking about a caster mob with Frost Nova kiting them, what else do I need to convince you? You think multiple different people, different accounts, different times, logged on to Wowhead on that specific mob page to purposely lie that he uses frost nova to kite people?