Note: The info in the guide is based on the known stats and behavior of the monster, and might not be accuarate.
King Wormzers are really powerful monsters. With their lab ability, a bunch of them is like a multi use Eye-ra that targets buildings. However, make sure that they don't chew a level 10 rg, as railguns can kill them easily while they're stuck on an rg.
Use them. Their splash damage will kill almost anything.