Originally posted by Faceplant8:

It's a mistlands defence, not a meadows defense. Try it against Gjall.

This was my first thought then I realised that Gjall don't appear in the raid and so if one appears near your base your far better off dropping a Work bench enclosed in a shack near the spawn site as per usual.

So yeah Ballistas as they stand serve no purpose except to kill you. Now somebody said if they had a safety so you could arm/disarm at will then just maybe they'd be worth the effort.