I understand now, I was thinking you hade 2.5 days but wanted to jamb the night show together.
The thing that is nice about the F! dessert, you don't have to claim a spot on the ground so far before the show to sit and watch. But the fireworks are not very good to watch from there.
Just to make it a more relaxed visit I would watch Fireworks and then F!. Skip WoC. Or if they have the 3rd WoC see fireworks then that, skipping F!.
If she is very willing to do it all. First WoC watch from the back and exit quickly ahead of the crowd. Rush to DL, watch the fireworks from any spot you can, because they will probably start when you walk into the park. You may end up watching while you carefully walk. Then the second F!.
Because it's a first visit it understandable to want to show her everything. Just don't burn her out.