Is it possible in a later update to have it to where Wizards/Sorcerers can cast Create Greater Undead as an available spell? As in tabletop it normally is a spell that is available to them, though default NWN makes it a Cleric-Only spell, and would make Necromancy as an arcane caster atleast a little bit more viable for something in your arsenal.
Not really requesting the monster part (Though would be fun
),
[Referenced from the D20 SRD for 3.5]
Create Greater Undead
Necromancy [Evil]
Level: Clr 8, Death 8, Sor/Wiz 8
This spell functions like create undead, except that you can create more powerful and intelligent sorts of undead: shadows, wraiths, spectres, and devourers. The type or types of undead you can create is based on your caster level, as shown on the table below.