Other than the Shadowcraft Mage archetype for wizards, are there an other official Pathfinder abilities/feats/etc that can increase the base percent of damage/reality from Shadow Evocation/Conjuration on a successful save?
I'm not sure, but I think there's a fetching or wayang (not sure which) bard archetype called shadow puppeteer that might do something like this. Not sure, sorry, but this is all I got.