Example of compact defence + reports

[Aildiin]

According to the battle mechs I've read up on, they'll move when they're the last attacking units left on the field.

In a compact defense scenario, however, it's kind of a moot point since they don't have to move at all. Even assuming max CD range - catapult - any reasonable archery and wall levels would leave the scout's starting position in range from round 1.

That is correct, I remember now.