My DS uses a dummy and he sleeps fine. As soon as he was able to put the dummy back in his mouth himself (about 5 months) he was sleeping through the night.
I would suggest trying a dreamfeed that way you can time the feed for right before you go to bed and get a better block of sleep. I used to dreamfeed at 10:30pm which would work well with your routine since it's about 4 hours after the last feed. then hopefully your DD won't wake again until the morning because she's been 'topped up'. My son used to feed really well at his dreamfeed because he was half asleep and all relaxed. He would then fall right back asleep with his dummy and would be good until about 6:30-7am. I think it might be worth a try since it sounds like your DD is waking from hunger.