Ah yes, he waited a thousand years, planning his meticulous revenge, only to be trounced by a bunch of novices and the spirit of his own master. His 'plan' ended in failure. And even if he had survived the Wall of Light or Luke's Praxeum, his destruction at the hands of the Jedi Order was nigh inevitable.
Except Kun did survive, just as he had planned. He did not plan for the Wall of Light that sealed him on the moon. But he waited thousands of years and then kicked (post Dark Empire) Luke's butt as a spirit.
This is what I don't like about Kun, for all his power and skill he achieved bantha poodoo, at least Malak accepted that.