how can i be a good panhellenic woman

Just my opinion. Girls join the sorority where they feel they fit in and they hope to get a bid from whatever place they feel most comfortable. Although there is a lot of talk, very few decisions are ever made on the basis of which sorority has the 'best philanthropy', etc. It can be very superficial.
At Florida State, just being in any sorority is a big deal, whether it's one of the 'top tier' or one of the bottom tier. There's no sorority where you can't have friends and enjoy a good time.
Now, to get to your question. If you are an adult beyond college age, your focus on 'values' is likely different than what's going on in the minds of undergraduate sorority women. As an adult, probably the best thing you can do to be a good alumn is to act as an advisor and mentor to the girls, and enjoy the fellowship of your peer alumni.
The truth is that 'values' is not a hot topic around the sorority house among the undergraduates, except at recruitment time when there is a lot of required politically correct talk.

Hey OP maybe you could get that stick out of your ass. You asked for no rude responses and got a pretty decent one from someone but you were rude in return. Good job.

You can be good by getting off this site primarily used by freshman and sophomores with an agenda.