what are the real sorority rankings here?

Tiers in a Greek system as laid-back as WashU's don't really make sense. The closest you can get is to rank sororities by individual qualities, which you can tell ends up pretty diverse:

Nicest: Alpha Phi, DG, AOII, ChiO, AEPhi, Kappa, Pi Phi
Hottest: Kappa, Pi Phi, Alpha phi, DG, AEPhi, ChiO, AOII
Most social: Pi Phi, AEPhi, Kappa, Alpha Phi, DG, ChiO, AOII
Best Thurtene (on average): DG, ChiO, Alpha Phi, Kappa, AEPhi, Pi Phi (AOII is not partnered)
Moving Up: DG, AEPhi, AOII, and Alpha Phi

last year at Thurtene ChiO, DG, and AEPhi were the best (along with their respective fraternities) so that ranking seems a little off.

1. kappa, pi phi, alpha phi (but alpha phi in particular is moving down)
2. aephi (getting better)
3. DG, chi o
4. aopi (will probably continue to improve)
KD is too new to rank, but seems like it will be above average

stop self ranking aephi.
no one considers you that high on the tier system.

Kappa, Pi Phi, Alpha Phi
AEPhi, DG, KD
Chi O, AOPi

thurtene is a carnival for kids. Totally irrelevant to rankings

Top: KKG, Pi Phi, Alpha Phi
Middle: AEPhi, DG, Chi Omega
Bottom: AOPi, KD

hope this helps!

Top: KKG, PiPhi
MidTop: Alpha Phi, DG
MidLower: AEPhi, KD, ChiO
Bottom: AOPi

KKG & PiPhi: They remain on the top even though as a whole, they can be a bit annoying. Great when individual though.
APhi: Love these girls. They're so outgoing and fun to hang out with and great individuals. Know how to have a good time
DG: Pretty much a light version of APhi. Still great girls, still know how to have a good time, just they aren't APhis
AEPhi: Lots of awesome individuals. Not always known for being involved in Greek life as a whole though
KD: Stunned at recruitment. But getting a bit of a full head already. Take it down a notch, okay?
ChiO: Love the girls, but just not the "coolest" of individuals
AOPi: They're getting a better rep! Keep going AOPi!

kappa, pi phi, alpha phi
delta gamma, aephi
chi omega, kappa delta
aopi

Top
kkg, pi phi, alpha phi
Middle
Aephi, Delta gamma, KD
Lower
Chi O, Aopi