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I agree with **JackFromShadowLand**; luck is one of the most important skills for Dwarves and should be taken as early as possible. It compensates for the Dwarves' low damage output (at the start) and, later on, especially with soldier luck, it activates abilities: bears + stunning claw, throwers + crippling, archers + stunning strike, larger units + increased damage, priests + fire sign... plus, of course, runes.