hi, well i weaned DS from the DF, also by changing the hour, so first it was at 11pm, then for 3 weeks at 10:30, then 2 weeks at 10, then one week at 9:30, and he was taking only 1oz, and he was waking up, so i decided to stop. I think your DD looks, similar to my DS (except she takes more oz), i would suggest to try and stop giving the DF, just see how it goes for one night, if it worked for me it might as well work for you too!
good luck, and let me know how it goes!