Nvm, I found it!
https://faforever.github.io/db/relationships.html
Hopefully, this is up to date.
Not sure I can do a table join in the client. I need to figure out how to run an arbitrary query so I can play around with it.
For the OP's problem, searching for high-rated players is about the best you can really do.
There probably are not many 4v4 games where everyone is 2000+. There just aren't many players at that level.
This was in a FAF game played offline, but I have the replay available.
I had 2-3
T2 Fighter Bombers (Notha's) on patrol. They repeatedly flew over an enemy T3 MEX and didn't attack it.
This happens around 38:00 in the replay, bottom left corner of the map.
Replay attached. There was a DilliDalli AI in the game, if that matters.
You can also enable Group Stealing in the options. If you assign a tank to a new group, it is removed from the previous group.