Yes. I tried it myself. Even one of my builds show proof of this and it’s called Charged Inferno. I don’t know if it will change but it’s intended now that Epiphany Bonus works without the epiphany set.
Still, it take up some slots to achieve that 70% Total DMG.If you find a way to use that y0% attack speed, that’s a bonus but that 70% total damage works without Epiphany to help.