Runes

I have a question for you about the Kassadin runes. I personally take right now Comet/UltiHat/Transendence/GathStorm/MagicBoots/5% cdr on everything, or Spellbook/MagicBoots/Market/5%cdr/UltiHat/GathStorm. I just want to know which runes do you take and why.