RPG Insanity

Excuse me being daft, however how do I kill clinker monsters.
All physical attacks ping off and I haven't found any magic that works so far.
I would love any help.
Thank you

With Critical attacks.
To raise the chance of Critical attacks, either get weapons with high Critical effect (the icon of the effect looks like a small sword with a strike effect behind the blade), or equip a bunch of Solid Gems.

I guess Hundred Gems also work to an extent, but they aren't of much use on higher difficulties or stronger clinker demons.