Thhe new Forbidden Idol might be a problem
Okay, riot is remaking forbidden idol to be more support friendly. It is giving supports +15% shields and heals for supports. Also as of now, However these aren't unique effects on the finished items. So is riot going to be happy if an abuse case scenario comes up?
I'm talking about
+ 



Q: (11 + 12) * 1.6 = 36 hp per second on her and maybe an ally W: (200 + 144) * 1.6 = 550 HP R: (350 + 132) * 1.6 = 771 HP per teammate (minimum) 1,156 (max).. we are talking potentially 5780 hp healed in one ult.
So in comparison, how much AP would she need without those items to get those kind of healing numbers?
Q: (36 - 11) / .05 = 500 AP W: (550 - 200) / .6 = 583 AP R: (771 - 350) / .55 = 765 AP
That is a lot of AP equivalence you can get from 4 items. Sure 9600 is crazy gold, but it's pretty obvious you are getting a lot of raw numbers from the new forbidden idol items. In contrast, even the AP boost from a rabadon's and another completed rod item is only going to get you 280 AP or so and that would cost just over 8000 gold. Now imagine if one of your allies got a
on top of all that healing. We are talking a 670+ heal on a tank on a 1.2 second CD. That's a bit much.