I am not from an English-speaking country, so please forgive my poor English from machine translation.
I use a lot of contacts and play PvP with a gimmick I implemented in my avatar. The idea is to reduce the HP of the opponent who has a specific receiver with a specific sender.
Here is a reference video and the gimmick in question.
I am using the mechanism to create PvE content that, with significant customization, allows you to fight powerful enemies with people who have implemented the same mechanism on their avatars.
(The uploader is a friend who helped me film the video, but the large monster and its companion-like creatures in the video are my avatars.)
Lots of BONE and CONTACT are essential to create such a mighty enemy. It is true that the load tends to be high, but some users enjoy playing with them in the way we do. Can you please do something to ease or remove the restrictions on contacts and bones?