how can you base tiers on looks?

The members of the "Old Row" sororities have to hide every time they see the DOG catcher.

Some girl is so bitter and jealous. It's really sad.

Truth hurts you sure have some sort of grudge you should get help with that

Truth Hurts is some kind of troll who has been posting awful stuff for months. Don't think he (speculation) even goes here, wish we could get him kicked off GR, or maybe some old row sorority girl scorned him. Best thing to do is ignore him, he craves attention.

Yes, any objective person would have a hard time picking out which pledge class belongs to which sorority without letters on. Funny, how no one will actually acknowledge this.

C'mon.... Perhaps the least attractive girl in house A may not be attractive as the best looking girl in house B,

But any sane person can look at the group collectively and say "that is a very attractive bunch". More attractive than the other group.

This holds true in sororities, fraternities, colleges as a whole, families, etc

We all know who these houses are. Not going to name them again, and there may be plenty of other factors in saying one is "best".

But let's be real. \n\n\n\n\n

You can rank based on anything you like - grades, looks, money, cars they drive, how much dirt is under their fingernails.
None of it means anything, and it's still just your opinion.

The short answer is you can't because what is attractive is subjective to the observer.
However, the whole concept ranks is just insecurity of the ranker coming out. The person posting tier ranks is trying desperately to justify decisions they have made through the approval of others.