Plasma sentinel shouldn't be only 50 points (details inside)
Plasma sentinel has the largest range of any trap, fires a homing missile, and applies an area denial affect.
lets compare this to other ranged traps
Incinerator 70 base cost, range 4, non-tracking, continuous fire.
Boltshot 50 base cost, range of 7(threatens 10+4with tracking potential), non-tracking(65 with tracking), single use (80 for 2x and tracking)
Bomb ejector 70 base cost, range 5, non-tracking, destroys nearby traps, single use, slightly unpredictable.
Plasma Sentinel 50 base cost, 5.25(spherical), tracking, continuous fire, area denial at cost 65.
Plasma sentinel in their current state when staggered create a machine-gun style firing pattern of area denial fireballs. these fireballs pierce flash barrier if they activate before it's deployed or if they are triggered at the edge of the barrier. while both the projectile and cloud can kill a raider, the cloud can not kill a guard. I have no issue with their functionality but i believe their power makes them at minimum a 70 base cost trap if not possibly 80.