Sorry things are so rough right now Amy.
Nap-wise, I'd limit the first nap to 1.5 hours and aim to get that second nap the same. That should help her not be overtired at bedtime, which can lead to night wakings. If she takes two 1.5 hour naps starting at 9:45 and 2:15, she should be tired but not overtired by 7pm and hopefully get a solid 11 hours of night sleep.
Food-wise, IMO at her age you should drop a bottle. That might also help her take more at the other bottles and ease things out a bit. I would suggest doing three bottles at 7am, 1:30 pm (do lunch first instead of bottle first) and then 6:30 pm. When we did this our DD starting getting more interested in her bottles again and drinking more.
I would definitely also work on phasing out the DF - keep in mind that it can take a few weeks for that to work but at her age, with three solid meals, she shouldn't need the DF. If she wakes at night for a feed you can try the watering down method described above - you definitely want her taking in those ounces during the day instead of at night.
Also, when did the night wakings start? Was it related to her starting solids or any new foods? Often times one of the only signs of a food allergy or intolerance can be night wakings...