SS or it's not true. I have , , etc enchant weapons and I know casters with . They all only reflect the attack addition the enchant normally does.
This is my 60 pagan, the weapon is Cultist's Blade (lv59 dagger) enchanted to .
Without weapon I have 2073 magic attack power and 260 physical attack; with weapon 2841 and 907 (I will consider only max attack for simplicity).
The weapon give 89+15 INT and 39 WIS, the base attack is 434 ... in the end my magic attack power with dagger equipped should be:
2073 + 104*1.3 + 39*0.2 + 434 = 2650 ... the real magic attack with dagger equipped is 2841 -> it seems I get 191 hidden bonus somewhere.
As proof let's redo the math for physical attack, considering that the weapon has 15 STR and 15 DEX:
260 + 15*1.3 + 15*0.2 + 434 = 716.5 but the real physical attack with dagger equipped is 907 -> the hidden bonus is 190.5 so the result is the same.
Did I do something wrong in my count? The SS should have all data, so everyone can check by himself.
Maybe the problem is not in caster class but in staff weapon that don't get bonus, while dagger do?