based on current chapter

KD/DG
APHI/DDD/ZTA
SK/AXO/XO
ADPI/GPHI/PIPHI
KKG

Hear me out. Overall all the sororities have been looking better and better since so many girls have been going through recruitment and its been getting more selective. Also tiers do not define a sorority.

KD is the classic southern sorority chapter here while DG has one of the strongest philanthropy events on campus both are strong for different reasons.
APHI would have been on KD/DGs level a few years ago but the rumors of the sisterhood issues have gotten around and taken a toll. DDD girls are pretty and have a mix of personalities. ZTA has a great presence on campus and always look beautiful.
SK girls are also super friendly and pretty, what sets them apart from ZTA is that they are absent on campus despite winning homecoming.
AXO girls are awesome but they aren't a classic "southern" chapter here which sets them apart from top tier. XO would have been ranked differently a few years ago but recently came out of no where and have been looking amazing.
ADPI pretty much switched with XO and slipped a bit, could have been from less social events or a tough recruitment but that doesn't take away from their sisterhood or philanthropy. GPHI is split down the middle,
they could have gone to middle tier two years ago but went a different direction. PIPHI seems to be left out sometimes.
KKG has some really pretty sisters but they block themselves off from the rest of greek life. Also weak philanthropy.