Pickaxes on the tool belt work to crack the shell of the TokHaar-Ket-Dill if a melee weapon is equipped. Volcanic damage enhancer does work on Dills, but, as of 1 January 2015, does not trigger with other monsters in Kiln. Dreadnips and fighting familiars are able to hit through their armour. If you are using the vampyrism aura, try not to attack the TokHaar-Ket-Dills whilst it's active. Doing so will enrage them. This causes them to always slam the ground when they attack you, causing massive damage. This can be particularly deadly when on wave 28 and attacking 6 at once.