Dwarf Challenge - Team Effort

Question

I've completed all of the challenges except for "Team Effort" (the fifth dwarf challenge), can someone tell me how to do this or at least give me a hint?

Answer 1

Hint #1 - The Annihilator's attack causes adjacent units to move.

Hint #2 - The Engineer's special ability is that she gets a larger boost from special squares.

Full Solution

Action #1 - Attack the Priestess with the Annihilator. The Impaler will end up beside the bottom Paladin, while the Void Monk will end up beside the top Paladin.
Action #2 - Attack the Impaler with the Paladin.
Action #3 - Move the Engineer to the Assault Boost square.
Actions #4 & #5 - Attack the Void Monk with the Engineer.