The LLTs can not be expected to stop verymuch more than equal cost in raiders. A couple of new anti-spam turrets have been introduced: the Scorcher and the Stardust, which replace BA's Beamer and HLLT. The Core's Scorcher has a heat ray, it does less damage as its range increases. HLTs have low rate of fire, high powered weapons. They can easily be swamped. The DET, an Arm EMP turret, has a powerful paralysis with a large area of effect. It tends to paralyze your own units however. It works ideally when in synergy with the other turrets. No turret lasts long without mobile unit support as artillery outranges it. Have some raiders at hand to charge artillery when it shows up.