Bonus % attack from attributes?

I have question about bonus dmg from Cunning.

In http://grimdawn.wikia.com/wiki/Game_Mechanics says “Bonuses to Magical Damage and Duration Damage from Spirit apply to both spells and attacks that deal those damage types.” So I should understand that spell=skill and any Spirit attribute point will increase all sort of magical attacks, no matter if they’d come from weapon attack or skill?

So what about bonus from Cunning? Any point would give bonus attack to weapon attack, but what about skill like Rending Force from ->Forcewave ( Soldier Class)? Does Cunning would influence on Rending Force: Adds +% physical damage to Forcewave? Is the same rule for DoT: Internal Trauma,Bleeding as they relay on Cunning also?

Spirit increases magical damage from all sources, weapon, as in, on hit effects or weapon attacks such as cadence or bladearc that have % weapon damage. Spirit will ONLY increase the damages that are considered “magic”. Cunning does the same, but for it’s own respective damage types.

So Cunning would influence on Rending Force?

Yes. Effectively, if it does physical, Internal Trauma, Pierce, or Bleed, cunning boost it, if not, spirit boost it.