I suggest to link this skill to special attack button (like Victors Rapiers shooting attack), so that we could use both the charged attack and this skill exactly when we need them and not like it now.
Also it would be wonderful to see some special animation for this skill: punching the enemies directly with the Bardin`s Power Fist itself! For Grimnir! For Drengbarazi! For Cousin Okri!
Thank you for your attention. )
upd: in this case it would be great to make this strike available without restrictions, but with some significant cooldown. So the Piston Power skill will not lose its relevance.