[quote=@Zarkun]
I only ask because I've been throwing various ideas around in my head to kill time on how best to best him in the future to keep me entertained.
[/quote]

Well, there's also the fact his precognition is less likely to happen as he runs low on magic power/gets exhausted. So Karn is really helping people out more than he realizes.

Generally though, his precog will always give him the upper hand, at least at the beginning of a battle.

But that's also how Luna has beaten him once. She used his cockyness to draw the fight between them out long enough that his precognition would stop triggering most of the time, then went full out on him. (Since she, raw power wise, is in fact stronger.)