WRONG FORUM OOF
What I've seen:
tank / healer / DPS
- 2 / 2 / 6 (I think the traditional 10-man)
- 2 / 3 / 5 (safer 10-man option)
- 2 / 3 / 9 (14-man, this is my preferred)
- 2 / 4 / 12 (20-man, the most common I see)
I've seen groups in queue with 25 people or more, and the ones I've joined NEVER seem to really go anywhere. Then again they're all PUGS.