Irony doesn't work, the mass driver is available for the dretches and basilisks that are hiding, a squad of rifles and\or shotguns can take down marauders and goons, and the tyrant is immobile on the z-axis so easy to track down.
What is your problem, not up to a challenging game?
Edit: and show me the places in the official maps. The beta ones do have these problems a lot admittedly.
Edit 2: I checked and there are only 2 places in the official maps and both of them are in karith. One up near the elevator room and one as a vent in the top of the large hall near alien base.