If Rylai's isn't going to get it's stats nerfed, it needs a cooldown between procs
I main champions who build Rylais, and even I know how bullshit it is.
If we're not going to give it less AP, then the slow effect needs to be worse. Having a short duration after the slow ends where it can't be applied again would make it a lot more fair. Just like two seconds or something.