This is probably a bad idea, but if Rylias becomes a Mana/CDR item.
What if Riot made Mordekaisers' max shield strength also scale with some % of the mana he builds along with his max heath? It could also open him up to other items that previously wouldn't have worked as well before like sheen items or rod of ages because the mana stat on those items was wasted on him. He would still use health costs for his abilities, the mana only helps his shield scale.
Thoughts? How bad of an idea is it?