Ya know a Rune that would be nice?

Assassins have had a hard time catching up to ADC's and Support's as of the last year, though they are "Apparently" getting worked on, riot's track record with that as of late has been less than successful but i have an idea.

Currently Keystone runes are extremely useful and i really like most if not all of them, especially because i can change them to fit the situation without having to change my page and this is really awesome but while most situations have been accounted for in runes, there is one that hasn't.

What does an assassin do against a team that's full of Shields and Heals? Or has one enchanter(basically the same thing nowadays.)?

You might say they simply build correctly, but that's not really the case. There isn't an item that "Counter's" excessive Shielding, or punishes someone for it, there are plenty of items that apply Greivous Wounds but 40% reduction on a heal that's 800 still makes it about 350 and that's still really hard to get over, just because the Support pressed a button or the ADC pressed Heal.

What i think would be really REALLY nice is having a Keystone rune that counter's Shielding, most likely in the Domination Tree. It could do what Irelia's Passive does and cause their abilities to deal huge bonus damage to Shields while applying a sort of Anti-Heal effect, this way Assassins can actually do their job, the same keystone could be used on Bruiser's and Fighter's to combat overly tanky teams which there is also not really a good counter for.

I don't know, i've been an Evelynn main for a really long time and it really sucks when i go in for a kill on a Low Health target and they just gain 2k HP from nowhere, it's so annoying, though i guess i didn't "Play around it" is what some would say, guess i should learn to play around a single button press giving someone twice my HP bar.