from
http://forums.station.sony.com/swg/posts/list.m?topic_id=520060
"Here's the best method I could figure out to get the Elite Mutant Womprats.
Head to waypoint -854 -3696 just outside Bestine. Once you get there, open your overhead map and examine the area to your north and east. This range is the territory you're covering. Kill everything and every lair in it. Kill anything in the area that isn't one of the under CL-10 spawns.
After a while, somewhere in the area will spawn a lair (a mound, to be exact) with 2 Mutant Womprats and 1 Elite Mutant Womprat. Kill all the rats but do not damage the lair. You want to drag this out for as many waves as possible. Once you're certain that no more womprats are going to spawn, damage the lair just a little. Now kill the 2 mutants and 1 elite that spawn. Once that's done, damage the lair to below half health. Again, kill the rats. Now destroy the lair and start the process all over again.
Most lairs gave me 5 Elites (3 before I damaged the lair, 2 after). I think a couple gave me 6, and I'm pretty sure one only gave me 3. Some times you'll get lucky and 2 lairs will spawn near each other. At least once I went an hour without a single one spawning.
Takes forever, and stops being fun long before it's over, but it can be done."