Guard Korlack  

This isn't true. Only the newbie guards are undercon. The other guards in the city are quite easy to kill. I have killed them by the hundreds. They provide good faction with almost everything in Erudin. In fact, killing them is the only easy way to get good faction with Erudin. Hunt in the warrens until you have good faction with Paineel. Then get key and enter the necromancer's city. Save this key. After this, kill skeleton guards, especialy in the first section. You can also kill the low level necros when you enter the first part of outdoors in the city. Just stay out of the shadowknight guild when doing this. The shadowknights will attack you if you get close enough. This is very easy. After you get apprehensive to dubious faction, hunt in the warrens again. Then repeat all of these steps over and over until you have good enough faction to Erudin. Finally, top it off with some faction hunting in the Warrens to be liked in both cities. Now only if I knew how to get Kerran faction!