Guide by Mafiasgrim (also Mafiasco), Leader of Legion of the Crypt, Albion, Merlin
Please note that while this guide says it is for Necromancers, it can still serve as a guide for all other classes (especially those that do Spirit damage). It is simply called a Necromancer guide because it is a place where there are fast, steady spawns of blues, yelos, and oranges. I try to pick places that have plentyful supplies of undead so that Necromancers do more damage and so that they can steadily pull without having "downtime" by waiting for spawns.
Also, this guide is meant for a Deathsight Necromancer. It will work fine for a Deathservent Necromancer, as long as they stick to blues, but a Painworking Necromancer will find that these places are not as great for them. It is COMPLETELY possible for a Painworking Necro to solo in these places, though I would reccomend that they find a "What to Hunt" a few levels lower than them so they can mass-kill greens.
Finally, this guide uses /loc to show where to find certain mobs. This description was taken from the Dark Age of Camelot Atlas::
"When you type /loc, you get a message that says something like In Malmohus: loc=21444,53878,2824 dir=214 .
The first part's easy. It tells you the name of the zone you're in.
The second part - the three loc numbers - is exactly where you are in the zone. The first number is how far east you are. The very westernmost point in the zone is 0. As you go farther east, the first number gets larger. The very easternmost part of the zone is around 63,000. The second number is how far south you are. The top of the map is 0, and the second number gets larger the farther south you go. The very southernmost part of the zone is also around 63,000. The third number is how high you are. In general you can ignore this number.
The third part - dir stands for direction, by the way - lets you know what direction you are facing. It works like a 360-degree circle."
That should explain /loc better than anything I can do, though I would like to mention that you can hit shift+c to bring up a compass, which is much easier to use that turning in circles doing /loc until your direction is right.