List of Enemies with Vulnerabilities to Specific Damage Types
Smashing: Devouring Earth crystals Council robots
Lethal: Devouring Earth Fungi Banished Pantheon Carnival of Shadows
Fire: Devouring Earth plants Circle of Thorns Hordelings Circle of Thorns Hellfrosts Cabal Sprites Winter Horde
Cold: Hellions Circle of Thorns Behemoths Praetorian Demons Snakes Legacy Chain Ember/Blaze/Inferno of Flame
Energy: Freakshow Circle of Thorns ghouls Praetorian ghouls Skulls Banished Pantheon Cabal Sprites Sky Raiders jump bots Winter Horde
Negative Energy: Praetorian shadows Cabal Sprites Legacy Chain Lambent/Lucent/Radiant of Light Legacy Chain Kaolin/Terran/Tellus of Earth
Toxic: --None?
Psionic: Circle of Thorns ghouls Praetorian ghouls Clockwork Banished Pantheon
Things that I can think of that need to be checked out in-game, and their pages on the Wiki should be updated:
Neuron robots (energy and smashing?)
Anti-Matter robots (energy and smashing?)
Rikti Drones (all but psionic?)
Hydra (lethal?)
Cabal
Coralax
Dockworkers
Cage Consortium
Family
Fir Bolg
Devouring Earth stone creatures (smashing?)
Luddites
Minions of Igneous
Nemesis Automatons
Red Caps
Psychic Clockwork