If you use Battering ram with an elemental weapon like a Staff or Wand ( Wands ) it will be 100% elemental.
If I remember correctly, that works for quite every warrior skill, if you use a staff, because it counts as a melee weapons.
No, Crippling blow for example is still physical even with a Staff, Battering Ram and Whirlwind are the two that scale elemental.
Edit1: Actually scratch that, after some testing I understood that all skills still scale damage, but some if not most of them convert all the damage into a specific damage type.
Edit2: Btw, I just discovered a few of these things recently, and tbh I just want to see how cool it is for a bow or a wand character to Ram through an enemy when they get up close to reposition and knock them down at the cost of 1 AP.