Just got a CoS for my Necromancer
 

Now that I am level 20 and have this bad boy, what's the best way to use it and where should I be hunting? I know nothing about it other than every necro I have talked to has suggested it.

Ask yourself, do i want mobs to see me in this area? If no, right click CoS. If yes, don't right click CoS

Overthere

charm kill undeads, use it to break charm when they are low and finish them both = easy exp. kurns/loio/unrest

The item has lost quite a bit of pulling utility due to how social aggro on invised players work. If you're looking for a specific mob, however, it helps you get the tag and beat the mobs to your location to set up a tag.

Lvl 20, unfortunately, you don't have root so you're stuck outdoors :( LOIO is a good zone with a meh ZEM, very steady though. OT mudpits are also still pretty good at 20 but starting to peter out. South Karana is useful--can do egrets all the way to avocets, centaurs and splitpaw gnolls =D. The giant skeletons in RM are pretty good in the 29-ish range too if south karana is packed (it was a problem before, lol).

edit: Also, kreiger's right, upper kurns is so good. dem charbones. Don't go in the basement lest you have giant balls.

Thanks for taking time to write this guide. Can we sticky this?

ill allow it

Lol, thanks guys. For undead charming does CHA still affect the charm or is that a enchanter thing?

doesnt affect necros

at 20 you could hunt crag spides in EK. i think there are 6 of them. good exp.