Super ability of the Dark Elves.

"Soldier's Luck" – hmm, the Academy doesn't have a single unit that could benefit from Soldier's Luck. Not a single one, unlike Gnomes and Humans.

The Witch's whip attack benefits from it. Although it's rarely used and not always to the Witch's advantage. Applying Berserk directly hints at the Witch's inclination towards masochism.)
Otherwise, it seems that only Mages don't have units that need Soldier's Luck.