Pet Imp helps Training

http://oi62.tinypic.com/2gt3fxx.jpg

Warp Imp helps train "Successfully attack an opponent who is using Magic Shield."; attack the enemy that is shielded by the Imp's magic shield, and this works for all four magic shields. I don't have a Lava Walker or Jungle Scout Imp, but they should probably work. I have no idea if another person's pet imp does training, though, but I don't see why it shouldn't. Just be mindful of the Imp's mana.

Also, for this skill, Saga 1 Episode 7 has four Elf Guards that only use Ranged Attack on the third wave (just past the first set of barrier spikes).