It's because the game heavily rewards running in large groups.
Minimal AP loss, while having greater survivability and more wins than in any other group constellation. Which means more fun b/c you win/kill more and less displeasure from dying and having to cross the entire distance between the respawn and the fight again.
Joy_Division wrote: »
ScruffyWhiskers wrote: »I just use them to build up some ultimate. It's almost comical sometimes to see a 70k hp guy wandering around and nobody bothers to fight them. Then there is the opposite extreme where 20 players are all pounding on them. I like to join in just because well I don't know actually something triggering a primal part of my brain probably like chasing mag sorcs out into the wilderness where they can get you alone. Sometimes you just can't help yourself.