What if Rylai's gets broken up into 2-3 specalized items?
With all the talk about rylai's going on, maybe instead of talking about what it should be, maybe we should start asking if it should be a single item or a group of items that build out of a mini-rylai's? For instance you could have a reverted form of rylai's that'll keep the current items name. Then you could have the AP+Mana+CDR item meddler was talking about. Then perhaps you could add an item that trades in the HP for some form of sustain.
Finally maybe riot could add an AP+HP item that isn't rylai's or RoA (different passive) for people who want a lot of AP and HP.
and it's underused