As a utility AP item, Rylai should have low AP and some CDR
Riot stated a while ago that they want you to choose between frequent, utility oriented spellcasts and single-use, damage oriented spellcasts. So utility items like Zhonya's need CDR. That's noice. Then why does Rylai have 100 AP? It should have 70 at most if not 60 AP, and possibly 10% CDR. Morellonomicon also escapes this paradigm with 100 AP and 20% CDR. It should be reduced to 10%, if not removed. Meanwhile, Void Staff could be increased to 90 AP.

for ap... that seems like utility to me
has 100 ap as well. they all cost the same they all have some kind of utility
which is = to
they both give tons of raw damage ( the most ) plus damage amplifiers

