What's so good about CoS for Necros?

[uolen]

Ill say I got to 48 and farmed one before nerf. Instant charm break is nice and you don't have to select yourself then cast it then select broke pet to kill or root like with goblin ring. Instant invisibility is very nice. I'm running the a dungeon, invis dropping click, don't even break stride. I love it, I would say it's is awesome to own but not necessarily game changing like I'm hoping a shissar staff will be.