Boy, you're getting heated. Someone needs to take a chill pill.
As for your argument, the GOP has already used every form of blistering attack they can against Hillary. And you know what? They appeared to have failed. And do you know why they failed? Because emails just aren't sexy. Claims that she covered up Benghazi might be, but when 8 investigations say there's no evidence, that becomes un-sexy. And where's the sexiness with her Foundation? That she worked with foreign governments? Unless you can prove something illegal happened, then no, it also fails.
The reason why the narrative worked against Romney is because it was easy to digest for the voter (He only cares about rich people), it was supportive (His 47% statement and tax plans that favored the rich), and it was something voters cared about (Helping the rich when everyone else is suffering is bad). Bain was just a small part of this narrative. You could have omitted Bain and the narrative against him would have been just as effective.
But the attacks against Hillary fail one to two of these three tests. First they aren't simple. They require explanation of why using private emails is wrong or why charities can't take money from foreigners. They are somewhat supportive, but that illusion loses its muster when the GOP launches investigation after investigation and they all fail to come up with evidence. And it's debatable if people really care about them. I'm not sure many are losing sleep over improper email usage.
Are you capable of having a rational discussion without exploding like a petulant little child?