I was wondering if they (Armor, Spirit armor) only set your common AC to the respective values or if they add the boni for Scale/Plate mail too (against certain weapon types)
On a sidenote (may be BGT mod related): I was noticing something odd about the Invoker kit while trying to scribe scrolls with Dynaheir and tested it on a generic self-created Invoker with the same results. They could not write Armor/Spirit Armor to spellbook because "your spellschool...". Yet they can CAST it and rightfully so as they are "Conjuration" spells and their opposite school would be "Enchantment". They can cast AND write other Conjuration spells (e.g. Monster Summoning I, Summon Fire Elemental) just fine. Now can anybody please confirm if this is a genuine (or even intended) SoA issue. If not I'm off to TeamBG for a bug report