Fairly Certain the Banish/Holy line have low M values for damage, and I was told early in the game Holy's damage was actually nerfed by SE. I 'feel' like it is less accurate however banish 3 is basically a weaker T3 spell, and on most NMs Holy does pretty bad damage for an nuke without Auspice/Misery boost (and even then if it wasn't for the quick cast I probably wouldn't bother).