[GranitePenguin]

It's also a conditional decision based on the goal of the scenario. For example, the ultimate goal of a basic Mark (III/V) attack is to stop the ogre. The actual target is the treads; the weapons are secondary targets and important only so far as to make your force more survivable while taking out treads.

Not every scenario is about stopping an ogre. It's very possible to have cases where targeting the missiles wouldn't drastically affect the outcome.