Sorcerer Necromancer

A necromancer is a Mage specialized in Necromancy school. In contrary to some peoples though most Necromancy spell don't only effekt Undead (only a few do). But some effect Undead in a diffrent way. Necromancer have a broad range of spells diffrent types damage, weaken enemy (debuff) or crowd control.

Usefulness of diffrent feats
Spell focus a given feat as it effect the successfulles of direct damage, weaken enemy (debuff) and crowd control.