Can we take 15 AP off of Rylai's, give it 100/150 HP, buff the slow, and nerf Cass' E again?
#Rylai's, currently, is only being abused on bot lane 'supports' as a moderately high AP item with a very modest cost. That's about it.
How about we push it back towards a real niche: Champions who lack CC who don't mind giving up a little AP for the ability to actually function in a game.
A significant buff for single target slows would be in order, and a very minor buff for AoE.
Nerf Cass' E because it USED to count as AoE/DoT for the purposes of spellvamp and Rylai's, and during her shit-tier rework, they removed that in an attempt to make the rework less trash. Now that she isn't trash, it should be there again. It was there for a reason since season 1 or 2. Put it back.
######Edit: For clarity, Cass' E would function the same as now with the buffed Rylai's, but other champions who need a larger slow/duration to function decently would get more mileage out of it.

) when Riot buffed the stats and items. A change to
, specifically increasing utility and tankiness while nerfing the damage of it would probably lead to the indirect nerf of Bot lane supports who don't want the Health that much and the buff of AP bruisers and Tanks, like
,
,
,
and
. I am biased as a Vladimir main, but almost all of the champions up there need some help right now. A buff to one of their items could help them all quite a bit.
Seems a bit ridiculous.
,
,
and
. If they are good at the Bronze-Plat level in Solo que, they break Diamond+, including competitive.
Nerfed too?
just got hit pretty hard,
and runes.
(1000g)+

just to nerf Brand Zyra and Cass?