I am not sure if this has been discussed or not:
The Helion 'Stunclaw'.
Snatching a character out of combat, and remaining in combat with the IC. This is a huge advantage! Hit n' Run will allow a unit to escape protracted engagement, but also gives them an 'easy' kill vs an independent character. What's better: you gain an easy pain token!
This is great!
Turn x--- charge into combat. Hit n' Run. Drag Character out. Opponent's turn--- can't shoot you--- locked in combat! Assault Phase-- kill character, gain pain token.
Turn x+1 Charge into combat. Hit n' Run--- Drag Character out--- ect.
This can be quite deadly against armies that have lots of Characters--- ie, Space Wolves and Blood Angels. However, both of those armies also are damn good at CC, so they'll beat up the Helions too.