Thank you for the feedback.
When I was talking about academia I wasn't imaging a student that is almost sure to steer a field, but more of a "regular" PhD student. For example I will be finishing a PhD in environmental science soonish. I think I am doing a good job there, but when I see who is applying for EA orgs it seems somewhat unlikely that I will get into one of the main EA orgs anytime soon (or ever^^). Therefore, trying to infuse EA ideas into the general discourse in my field might be one of the few things I can do while in academia.
Regarding what local groups could do, I am still a bit unsure what is the best approach (which is why I did not include it in the post). But a few ideas floating in my head are:
Probably some of those ideas (or all?) are already included in the bigger EA groups. However, the smaller groups that I have met so far (in Germany) are not yet so sophisticated.
Hard question, as it depends on a lot of parameters. For example:
It also depends on how big the possible impact of the group or the EA org is. However, if in doubt I would say that often the local group might a very good option, as it can easily act as a multiplier by enhancing the impact of other people in the local group.