Just leaving this out here...
Sylas potential max heal: 300+100% AP Soraka max potential heal with W: 220+60%AP Soraka max potential heal with R: 350+55% AP So Sylas heals himself more than a max level Soraka who uses HER HEALTH to heal OTHER people just to balance it(who is still nerfed whenever she becomes slightly overbearing BECAUSE OF THIS). Why is this a thing? Even worse Sylas builds more AP than a Soraka ever will, meaning he gets even more healing out of it.
Nerf the heal, give it BONUS HP scaling instead of AP, or SOMETHING so that it isn't so friggin busted please. I mean you did want to make him a bruiser, but at this point he's like an assassin with more resistances. Or you could give us 2 bans each, I think you have enough characters to do that at this point.
It's also be nice if he actually had to land something to use it, I mean...it's point and click.
builds so that healers can get high potent heals without the AP damage nukes. I think you're right. Healers just don't shine compared to the heals you see champs like Sylas or Vlad pulling off because the AP scaling leaves supports in the dust.