In base NWN these were decent, if not amazing feats, but their usefulness has spiralled downwards relative to Spell Focus feats due to the buffs affecting the latter. So I suggesting giving some flavour to them too to spice up the field. For example;
Enchantment: half duration to hold and dominate effects active on you.
Divination: bonus to either resisting or detecting scrying.
Transmutation: immunity to Flesh to Stone.
Conjuration: see the location (area name) of someone attempting to -yoink you.
Abjuration: already has a bonus, in +2 to resist dispel checks.
Necromancy: summoned undead gain a small bonus to turn resistance.
Illusion: reduce the effects of concealment miss chance by 10% or so.
Evocation: 5% Damage Reduction to all elemental damage types
Arcane Defense
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