I am a mother of three and a qualified assistante maternelle. You can strip her off, no mater how much she may shiver and complain about being cold. You can alternate Doliprane and Advil every three hours where as Doliprane you have to wait six hours to regive.
We were specifically told in our assistante maternelle training NOT to give a cool bath.
Watch out for convulsions (frequent above 40), my neighbours daughter just had one this weekend while I was there, VERY IMPRESSIVE!! If you have trouble waking her and she seems non responsive, id get her off to the hospital. Each child has a different reaction to fever, mine seem to bounce off the walls no matter how high they are, and others are lethargic and can have convulsions. Keep an eye on her, maybe sleep close to her tonight if it hasnt gone down. USE YOUR MOTHERS INSTINCT!!