Question about the 'Necromancy' skill and 'Necro Call'

[devmoon]

how you get these 100s of inquisitors, after reading this forums for a while it seems everyone is relying on sacrifice and you would be screwed if you dont get it. I usually plays using the same tactics like ressurect each units that dies,
but this gets so damm tedious. I want to really know how all skills work and take full use of everything the game has to offer. I really dont wanna use sacrifice.