There might be some server-to-server variation on this, but Watcher always seems to be a reasonably popular raid. Cool and memorable boss, fun mechanics, semi-challenging even when you're 30 levels above, so it's not hard to see why people like it. Watcher groups aren't advertised that often, but they seem to form pretty quickly when they are.
Envoyé par Calta
Cainwen Ciaphas, Captain of Crickhollow, HERO OF MIDDLE EARTH!!!
I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered! My opinions are my own!