There was an old post, not sure if its worth trying but keep in mind the tricks in the game back then. Like clearing all mobs to increase the highland lions etc
This is not from me but something I found, not tested
METHOD:
Reset the field of bone mob population to one type...I chose scorpions. The geographic area is from the Kurns ramp north, all areas east and the southernmost boundry is the first ramp on the east side of the pit opposite the Kaesora wall. It took me about 2 hours as a pet class keep killing all non-scorpion mobs and leave alive the scorpion repops...eventually everything was scorpion. This itself could spawn the rare but don't count on it.
Once the entire spawn was scorpion I killed one single scorpion. It it repopped instantly in the geographic area I outlined I would keep killing the repops until another scorpion popped. Then, pick a different scorpion and rinse repeat until I found one that had a 5 minute repop. Then I would keep killing the 5 minute repops until I got my named which, on paper, could take forever due to the 1% spawn rate.
With this method I killed the Scourgetail Scorpion in about 13 hours with a few breaks here and there.
You can accelerate this process by picking a SECOND mob type to allow to live...although a bit more complicated. You can make scorpions your base mob and allow iksar manslayers (for instance) to live if they are respawns. That way you won't accidentally kill an insta-respawn mob you cycled through before. This will allow you to find more than one five minute mob to "camp" improving your chances of getting the rare named.
