I am very confused by this. It used to be +30% WPA, now it has been replaced with spell
success.

So are my wizards 40% more powerful on offence only? or will they also be defending with an extra 40% modified WPA???

reason I ask is that some of you already pointed out that faery's gained mage fury, so if
40% spell success is only for when you cast spells and it doesnt give you an
extra 40% WPA to resist spells then its not worth it at all!!