So, uh, I'd just like to point out that Boney usually doesn't make right or wrong options. How well a plan works depends a lot on the rolls, and little else. If we roll really well or the orcs roll badly, we could certainly hold them at the second line with minimal losses. We could also bleed them completely dry with traps. We should not, in my opinion, be comparing what CAN happen, but rather the end states of either option. If we fail, Hold becomes a tactical defeat--lots of lives lost for more casualties on the enemies to make it happen--while Withdraw becomes a strategic defeat; less dwarves lives lost, but the orcs now have the mountains, with all that entails, and probably lost less forces. For a victory, however, you flip it. Hold ends with the strategic victory in the orcs straight up being routed, albeit with more immediate losses on our side, while Withdraw becomes a tactical victory, with the orcs still having their territory, but severely weakened at little cost on our side. So the question really is, what's more important to you, Tactics, or Strategy?