I think I figured out how to fix assassin's and supports

I want supports to be the most important member of a team. And I don't mean the support position, I mean the support archetype. Specifically, enchanters...Supports with very heavy CC or durability would, of course, not be part of this.

I want supports to have heavily scaling team-oriented utility that's substantially weaker when used selfishly. Things like massive, repeated shields for everyone BUT yourself, big attack speed and/or ad buffs, repeated cc cleanses that you can't use on yourself, etc. Stupidly strong stuff that only works on the team.

I want enchanter-tyoe supports to be the focus of a second type of team fight based team, one that works very differently from the wombo, but is just as effective - and just as easy to counter if you have the game knowledge and coordination.

That's where assassins would come in.

Because as mind-bogglingly overpowered as these supports would be, they'd also be squishier than a sponge made from jello. Any champion that can dance past the Frontline, cripple a target, and slip out again would feast upon these delicate casters. There would be counterplay, of course....But there would be less dedicated peel for the focus of the teanfight, and the ability to get in and snag one target would be much more valuable than it currently is.

Thoughts?