I don't think anyone would be comfortable saying which sorority was "best" at Duke University, especially this close to rush. I personally only know the reputation of my own. I'd suggest you go to the greek life page and see if they have an Order of Omega page... that will show the awards that they have won. My best advice to your daughter is for her to go through rush with an open mind... she'll be able to figure out just through rush which sororities are known for which things, and if they've received a lot of awards I'm sure they will tell her that. I'm sorry I can't help you more... but I'm biased, as you can see!