nationals

from what I've seen, chi o is a little more on the stricter side and I'd say agd is actually more on the less strict side. Just based off how the girls in each act.

Honestly the way Greek life is headed you will get in trouble in any sorority if you do something blatantly wrong.

agd is known for being a "strict" chapter nationally because they'll revoke charters when most other sororities would propose sanctions or send a consultant to work with the members.

This happened here not all too long ago where the girls were struggling with recruitment; so nationals came in, forced the current members to go alum or quit, and then recolonized a completely new chapter.

They also just revoked Miami of Ohio's charter, not because the members were in anyway unruly, but because they were having troubles similar to what AOPi has here with retention and recruitment.

So all of that plus what's happening at OU does make OSU's chapter fairly proactive

Yes some sororities' nationals are more/less strict than others, but don't let that be the deciding factor when choosing your house. All of the sororities here generally abide by the same rules, and most of the day-to-day regulation is done by Ohio State's PHA (whose rules apply equally and to everyone). Nationals usually only get involved if things are relatively bad or if you're unlucky, and by that point you're getting in trouble no matter who your nationals are (e.g. look at Kappa whose Nationals were very lenient with them).

I feel like your friends go to OU because those chapters there have had run ins with nationals the last few years
But with that being said, I guarantee almost any chapter you join you will spend at least one semester on sopro because no one, OSU or the national sorority, wants to be known as a problem chapter, so it's easy to get in trouble for minor issues. Though honestly if you just do whatever nationals asks to fix the problems it shouldn't be a recurring issue