Her being a woman will be a slight advantage. She needs to do well in the Math subscore. They look at the Math subscore especially for borderline applicants. She also needs a very good GPA and to have taken a rigorous course load. Here’s the kicker with Illinois, if she applies and is admitted, she’s in. At both Purdue and Wisconsin, you need to apply for admittance to the Engineering program of your choice near the end of your freshman year. That uncertainty was a big factor in Illinois favor when my son was admitted to all three.
It’s not a matter of getting her hopes up. Apply. She’s got a shot, and you’ll never know unless you apply.
Good luck.