1. MINE SWEEPERS: Any mine attack against an Engineer squad is resolved as follows-
*Attack Roll is doubles: Multiply the roll by two before adding it to the mine strength;
*Attack Roll is not doubles: The total attack strength is reduced to zero, no Defense Rolls are made, and the Mines counter is removed.
How are mines attacks against units stacked with an Engineer handled?
The first time I played this scenario, my opponent and I decided that the special rule would also apply to any units being attacked by the mines at the same time as the Engineer; ie: either the same doubled attack or nothing.
Another situation that could come up is when a unit moves into a Mines hex that is already occupied by an Engineer. I would think that in this case the Engineer is not being attacked, so the mines would attack the other unit normally with no possibility of removing the Mines counter.