Not even nukes can kill them
Clearly you haven't done enough research.
Use the railgun from Aquilo and shoot down the length so one shot penetrates multiple body segments
I haven't traveled to other planets yet.
Tank cannon shells have the same penetrative capabilities, are unlocked on Nauvis, and can easily be grinded up to uncommon and epic quality for that extra DMG. Haven't tried them on big demolishers yet, so maybe they end up not being enough?
My tank gets destroyed before i can do any damage.
Nukes just piss them off, 0/10 do not recommend.
I just make a blueprint of a regular turret that has 5 mags in... Then plop it down 100 times