It appears that the many animate dead wands and items can be used by certain classes, however it's summon does not remain. "Breaks free of the bonds."
My character holds a ring of Necromancy which provides the wearer with SF: Necromancy.
I loaned it out to a fighter character to test if they could summon undead through the animate dead spell when they had SF: Necromancy.
This however did not work. Does animate dead work as intended, despite the many items ingame allowing non wizard/sorcerer classes to use the spell?
Animate dead (spell & item but not scroll) uses a point-based system derived from the characters caster levels, spell focuses reduce the amount they cost.
It works a little differently from conjuration, where a conjuration summoned by an item doesn't require that pool of points. ** Correct me if I'm wrong.