new tiers

In the last two years, a lot of sororities have risen while others have fallen. Here is what appears to be current tier rankings based on pledge classes, involvement, and overall reputation.
TOP:
Theta
DG
Pi Phi
APhi
AXO
DZ

MIDDLE:
Zeta, Kappa, KD
Gphi, Phi Mu, ADPi

BOTTOM:
Chi O, Tri Delt
AOPi, AGD

Falling: DG, AXO, Gamma Phi, Chi O, and AOPi.