Well, Lavender is still after Ron, so she's gone.
Katie is sharing baby batter with the other two Flying Foxes, so that ones gone.
Harry really seems to be pushing Ginny towards Neville, so I guess that pretty much takes her out by now.
I'm also predicting that Susan, Hannah, or both are likely going to be moving on, but I'm not totally sure yet.
I also get the feeling that with Padma joining, that will pretty much derail Parvati.
Still, until I get something further, we're down to Parvati, Daphne, Tracey; Susan, and Hannah.
The biggest mistake anyone in the HPverse can make is tempting Fate when Harry or those close to him are involved.