So in the Impersonation rules, "Impersonation Markers are considered Allied Troopers, so Attacks cannot be declared against them. Any shot with a Template Weapon that affects an Impersonation Marker is cancelled, even if another Enemy Trooper was designated as the Main Target" So does this mean if I plant an impersonating killer hacker in the center of a fireteam he isn't a part of, he will essentially prevent the fireteam from being hit by template missles and heavy rockets? Seems like a great way to fortify a fort kickass.
Yep, Grief op is a great backup piece for this. KHs are also useful, but less so because they can't start in Cybermask. It's especially nice against Guided, bcause there the opponent has no choice but to use the template - against HRL and such, they'll just use hit mode.