I'm not really sure. Do you think she has a suck-to-sleep association? What I mean is, do you think she only knows how to fall asleep either with the paci or the breast in her mouth? We all wake some time at night, the trick is learning how to fall back asleep on our own. You are feeding her 2x a night now, right? What you may want to do is pick one feeding (the one you think she is less hungry at) and slowly reduce the minutes. So, if she feeds for 10 minutes, offer her the breast for only 9 minutes for a couple of nights, then 8 minutes a couple of nights, until you aren't feeding her for the second feed. She might be using you as a prop, and she may be accustomed to getting a lot of her calories at night and you want to break that habit early if it isn't true hunger.
I seem to be talking around in circles and not really helping too much. Maybe someone else will chime in here with another idea.