That is solid proof IMO for 2+2+3, they could all be alt accounts or part of bigger farming ring.

Rizzlarola has found a good way to connect farming accounts (https://bitcointalk.org/index.php?topic=1597201.msg16041033#msg16041033 , https://bitcointalk.org/index.php?topic=1597201.msg16045597#msg16045597, https://bitcointalk.org/index.php?topic=1597201.msg16055803#msg16055803 and so on) but unfortunately they are not active any more.