Rampage with Aftershock Support

Aftershock Support rolls its 35% chance at the start of rampage, and every single slam during Rampage will proc Aftershocks.

I assume its meant to roll 35% at every slam during rampage.

This can be abused for massive damage if you can be bothered to cancel/re-cast Rampage, but for chill gameplay I would like Aftershock to works as I assume is intended.