I mentioned that seeing someone stream AM2R would be great since that person is already great at Fusion and ZM. Then I was alerted that you risk getting your Twitch channel banned for doing so. Is this accurate? Have any of the runners here ever been concerned with such a thing happening to them or others?

It's just a game lol, none of us have neither been banned, got a warning or anything

I have streamed AM2R for over a year now, and I haven't got any bans so far. Personally I think it's safe to stream it, given that the game is not even on Twitch's list of banned games. Especially if your stream is rather small you shouldn't worry at all.

https://help.twitch.tv/customer/portal/articles/1992676-list-of-prohibited-games

Nintendo doesn't seem to be interested in taking down AM2R streams or videos either.

I think that Twitch would warn you if you can't stream a certain game, if it's not on the prohibited list. If they just outright shut down a stream that'd be wrong IMO.

Twitch does have a section about DMCA stuff in their terms of service. From quickly reading it it looks like you should be fine unless Nintendo specifically complains about your stream.

Which they won't I feel like. If they cared, they would have had all the AM2R videos on YouTube taken down (which they haven't). I'd say it's safe to stream it.

Would you be in more danger if you're a Twitch partner?

No clue, but I'm sure they'd give some sort of warning.

If you are a Twitch Partner you would definitely get more attention and therefore have more chances of getting noticed if Nintendo is looking for AM2R streams to take down.

I am sure it would come to a warning at first only in case theres any at all. So far I think streaming it should be fine.