Talk:Karthus/@comment-33172118-20171206214006/@comment-5211662-20180217103336

With the changes to AP items in PBE, going for a CDR heavy build is more viable than before. Archangel's Staff will now provide 20% cooldown reduction. Then add Zhonya and Ionian Boots (you will not even need Ionian Boots if you have Transcendence as a rune) and you can easily get 40% CDR (or 45% if you have Cosmic Insight).

That without having to sacrifice Rod of Ages or Liandry.