I think this would be a little complicated to implemented, maybe a simple way to help new player would be to simply add a new aps call the good
"samaritan aps" let say 1000 boss kill in low level map while a level 50(just an example) player and below was there?

and/or

maybe add a board where we can see wich map are active atm, like in PL?
Maybe end game player would be more incline to help if they see which map need help right away,
instead of going in every map to see if someone there.