I've camping him for hours after a patch. Killing every red skin in sight. Still no spawn.
After 4 hours I got one to pop. I can almost guarantee that this mob isnt on a timer. After pop, I went to sleep, woke up and looked around to find none. It is 2008, the chances of someone coming to this zone are slim. My assurance is further increased because other named mobs were up around the zone, so it is highly unlikely the raldukan was killed while I slept.
Edited, Aug 12th 2008 11:53am by Skoz