The Harbinger....Although I just think I go at the right time. Usually around 5:30 to 6:00 pm CT. If I join later or on weekend the wait is usually longer. Usually always do DPS first even though it isn't my main for that reason. Weekends healer is really fast, but DPS takes forever and a day.
Also may have something to do with my luck. Usually always get the group at a time in BH that I do not want to get the group. Like while installing listening devices or in the acid pool.