So the idea with the area is a few synergistic elements.
The lictors are used for their pheromone trail using infiltrate to try to get into a nice out of LoS place to help the mawlocs zero in without deviation. They are also great tools for killing weak deck chair units.
The bastion is where the real fun comes in, the venomthrope occupies the building expanding his 6" bubble and providing protection from his lurk instinctive behavior (he cannot run away if he is embarked). The hiveguard are up top shooting with their ignores cover str 8. Carnifex, mawlocs, crone, and hive tyrant are providing board control while the termagants supported by shrouding are a durable unit allowing the tervigon to outflanking using hive commander and get scoring into the back field.
The list needs testing and tweaks but i like what it does. It does have a scoring unit shortage but that is easy enough to tweak. If I have to, I can drop a carnifex for more scoring.