
Originally Posted by
scout's honor
The Lash part is irrelevant. The Mortar can sac movement to get back up and still shoot, so you don't need it. This means you don't need to hit the mechanik UA, in fact you don't absolutely need a model there as long as there's a model to throw at in the general direction you want the Mortar to move in and you're willing to take a chance on the deviation. Alternatively, you can use a model that can take a bigger hit than the mechanik UA can.
Additionally, if you fail the Tough roll with the leader of the Mortar Crew you don't get to shoot anymore that activation. One of the Grunts is promoted immediately, but he doesn't get to shoot the same turn.