How to make whole server PVE(disabled damage) but PVP(enabled damage) on certain zones(mostly monuments)

Hi, i would really appreciate to get a developpers help to manage what my title is saying. I have tried with Zone Manager plugin to set up 1 zone that covers the map and put godmode on it and i've set up a child zone inside it with godmode off. I did set the parentID and everything is working BUT when i enter the child zone i get rolled back out or kick from server for packet flooding and/or player tick. I managed to fix the kick for packet flooding and/or player tick by upping the value on server.maxtickspersecond and server.maxpacketspersecond but i still get that roll back. So i've tried other ways to do the same thing with plugin TruePVE but still cant make it to work. Any devs can help me out achieve my goal of making the entire map without PVP damage and only PVP damage in the zones i choose? Thanks a lot.