There's no set ratio that will work for everyone...if there was, and i knew it, i would be a rich woman...but...
Protein - at least 50%
Carbs - no more than 30%
Fat - adjust according to the above numbers...
If carbs go lower, protein/fat goes higher
I wouldn't worry about losing weight...if she does it correctly, she may not lose actual numbers on the scale, but she will be losing fat which i'm sure is what she ultimately wants
What are her numbers now? If it's not working, you need to change something and without knowing them, it is difficult to see what we can adjust
The weight training will help a lot, even if she doesn't change a thing with her diet from where it is now
I would drop the cardio after weight training...if she has been doing it every day (which it looks like she has been), it is probably too much
1500 calories/day isn't a lot of food, even without doing cardio 7 days/week
What happens here, stays here