I have 12 on platforms 4 pillars high scattered around my base. I have an issuse with dino spawns in the base. So they act as a long range needle launcher. Weigh down with sand because its weight isnt affected by the dragons buff. Set all to long range aggressive and u have a protected base. Add a few plant X for added assurance. I no longer have spawn problems. Found a ready to tame terror bird today too pretty neat.