On 25 man. I'm playing on one of the biggest Taiwanese servers and it's kinda sad to see the decline in the number of quality players in each expansion. Regardless of my server's population, no guild has killed heroic lei shen on 25m and only one guild managed to kill it on 10 man recently. You could have 2 40 man raid groups on the nerfed Oondasta and still wipe. You could be in gold raids and get stuck on the first few bosses, with or without carrying people. You could be in a guild raid and it takes more than 2 months to kill normal Lei Shen. The reason, IMO, is because Taiwanese server players have much less access to in depth information than say US or EU players because most of them do not know English. Secondly, their communication is much less efficient because players from different areas of Asia actually speak different languages. Finally, their discussion forums are pretty much dead compared to US and EU.