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2% Machines, 8% Chaos... In my opinion, it's easier to choose skills that are actually suitable for Elves. But if both skills appear, it's worth experimenting. Elves are fast fighters, and they can realistically eliminate a large part of the troops in melee or ranged combat in 2 turns. The bonus that gives an attack is better than waiting 2 turns to charge an arrow and fire a volley...
IMHO...
IMHO...