I only caught the last 45 minutes of the event, but Roc was outside jangan south, and the gms were spawning most uniques, during the last half hour, ISY URI and TG all spawned at least 3 times each when i was there :o
I've got a few screenies of it which i'll post later if anyone's intrested

Pitty im not high enough lvl to attack any of them with out dieing
