Mirror Image has Summon DMG % increase in hero points. I think it counts as a summon because it is basically a summoned mirror image of the rogue as well as Summon DMG increase. Of course fury proc from apocalypse or legend affix on rogue is possible.
Dickwads build makes sense when it was shown. uses mirror image for summon build project cough evil plans
I mean I already had the Wizard pierce alchemy build and the chakrams with mirror images build to maximise both their potential. I haven't really worked on them but planned em very well. Pierce dmg 50% hero point to exploit with many enemies. I know guidedshot also has Pierce DMG affix and some other skills but those builds are my fun builds. The chakram one was test build and the Wizard pierce was a legitimate plan.