what are the sororities with the best philanthropies?

I’m looking to go through recruitment and philanthropy is a huge part of why I want to join.
However I feel like everyone is just gonna try to hype up their philanthropy at recruitment, and I want to know the truth. What are the best philanthropies that are represented on campus?
I don’t want to sound rude but I wouldn't accept a bid from axid because of autism speaks. It’s really not about tiers for me but it does matter what the philanthropy is.
From my own individual research on the organizations here, it seems like AXO, XO, Phi Mu, SK, and SDT have the best philanthropies I’d like to know more about.
I’m a little confused though, since SDT seems to have more than one “national” philanthropy? The prevent child abuse America one I’ve heard of before. Is it normal to have more than one? Do chapters choose that, or are they more philanthropic than others?