[Superman]

I would have a temptation to flail about a bit. That is, talk to HR. Talk to competitors. Call associates and ask about current and upcoming opportunities. Talk to promotion boss. Talk to your current supervisor's supervisor. Folks like this woman are usually being watched anyway, and management has to be already aware of her shortcomings. This kind of thing flies directly in the face of the best interests of the company. Talented people should not be crapped-on. Poor managers should not have much freedom, and I'd guess this woman's decisions are reviewed, or could/should be reviewed. Without deliberately trying, the asking of all these questions will likely teach her a lesson. That she'll ignore, then forget. And when it's all over, if you're still with the company, your stock will be very high for several reasons.