the limit is X3 up to a certain point :
- Players with up to X3 your points can attack you and be attacked by you
- Players with up to less than X3 your points can attack and be attacked by you
However, once players reach 150,000 points they become attackable by all players in the Top 100 if they have over 150,000 points themselves, otherwise, the X3 limit is still always applied everywhere else.
