If you were to do a Kit Rework OR just have a "add on " within his skills on Karthus

{quoted}

Hmm, I think I'd give his slow walls a delay, reduce the range of his death aura, reduce some mana costs, and reduce the scaling of his ult.

Wait, no, that's Riot. I'd leave him alone.

that honestly really does sound like Riot lmfao