No doubt her handlers want her to stay sober for the debate - which will be the most difficult task for her.
Then they will want her to bait Trump, to try and get him to react. If she fails in either of these, she's toast. If Trump keeps the focus on her abysmal record over the last 4 years, the election is over and she might as well pick up her box of Kirkland Chardonnay and go home.
After her coaching lessons fail, they will try to dream up some excuse for her to bail. She couldn't out debate a turnip.