"Regardless, her manager should be able to help. If not, she needs to find a manager that can."

I agree. However, in my experience that is really hard. In the past 2 years I've had 7 managers. Only one that might have been good. Any tips for finding good ones?

Find one that just got promoted. Someone new to the position probably has good life experience but hasn't yet been corrupted by corporate interests.

That's terrible advice in my experience. The new people have little power and don't understand the politics involved.

People with little power and no understanding of politics, in my experience, are more likely to give helpful advice.

Maybe, but the advice won't matter is you're getting screwed in your reviews and such.