I agree that steroids for a relapse generally do not improve the outcome but only shorten the relapse time. So it's good to use them sparingly for when a relapse is really interfering with functioning or is involving serious non-sensory abilities. They have risks of serious side effects which increase the more they are used. They can also stop working with repeated use.
That said, if she has optic neuritis, studies show that IV steroids may have a protective effect in reducing relapse of ON in the future, so she may want to consider an IV if she has ON. How long has she had these new symptoms?
Anti-inflammatory foods may help to reduce the inflammation going on in the body and aid in recovery. Sleep and rest are also very important, and avoid stress until she feels better.
Hopefully she will recover full capabilities. Physio can also help.