Are powers such as Vemon Thrust, Daredevil's Extensive Strike and Web Bullets considered energy damage or just power damage?
I think they're physical damage.
power damage means the dmg of any power regardless of the type of dmg it makes. other items like mandarin's ring only works on energy dmg and, therefore, would be useless on a character like Thing, DD or Elektra, who do not have a single energy power.