Off the top of my head - how do we treat cover for such a unit? Since we don't know that you can target the MC independently, since we lack a rule stating such as with the IC MC mixed squad rules, how do you handle that? If the unit is composed of 2 Tyrant Guard and a Hive Tyrant, and the Tyrant Guard are standing in cover but the Hive Tyrant isn't, does he get cover even though he is not in cover according to the rules for Monstrous Creatures?