rankings based on the last 4 years

within the tiers not in order
top- APHI, DG, KD, DDD
Middle top- ZTA SK
Middle- AXO XO
Lower Middle- ADPI, GPHI
Lower- PIPHI, KKG

Keep in mind each house has a sisterhood, philanthropy, social scene and they all have pretty girls. Each house is different but really not as extreme as recruitment makes it seem.
All the lower ranked sororities are still great sisterhoods and I would never discourage anyone from joining any of the sororities no matter what the reputation. Each sorority has a strength like DG has anchorsplash which everyone loves to do, XO has been popular with the frats, and KKG has one of the tightest sisterhoods. You could say a positive thing about each house.