AFK Farm Locations

I don't know if this is the right place but I am looking for XP AFK farm locations. Gold isn't important here. I am doing it for mastery ranks just looking for consistent xp - preferably hidden locations Icebrood, HoT, SoTo are the main materys I still need to fill out but open to PoF/Core as well

multibox a group into citadel of flame p1
( Minion necromancers or Mechanists),
set up on the flame pillars

make sure everyone has jade bots with trophy or magic scavenger cores and enjoy endless core mastery exp and enemy spawns. They won't drop loot, but they will trigger the scavenger procs on the jade bots.

pretty smart !!!