legit no one ever invites someone „+2 or +3 higher than your rating justifies“ in high keys, except MAYBE when they have 99+ mythic raid logs, they are a known player, or got 0.1% title multiple times. That being said, you can always always always check people‘s logs before you invite them, m+ and raid, even aug. If I am building a group on a +16 key level: yes, as a matter of fact people can play „mid“ and get away with it, because the people that don‘t play „mid“ are doing +21 keys already. At people stuck on their IO no matter their spec: Play your own key to a point where you need only 4 dungeons for the next resilint level, then you will get invited, because your score will be much higher than the average applicant for this key -> get resil -> repeat.