Hey, I joined a farm group I found in the forums today. We split ourselves so that each of us would terrorize one act and get an "equal amount of chances of getting loot". I just wanted to bring up the following point we realized mid run:
It seems that triggering heralds is a global event, and it is not bound in any way to an act or area. That is a bit annoying because a player can "abuse" the game a bit to get more heralds to spawn for him than other players in the game.
Nonetheless, if you want to find a game to terrorize with other people, should be relatively easily to do so by posting somewhere here