Bashing does by far the most damage to skeleton.
other than that, Im not sure which mobs are more/less suspetible to different damage types. anyone know? i know its technically in the wiki in a monster list, but its hard to find.
Related post : http://smf.cataclysmdda.com/index.php?topic=4511.msg66600#msg66600
http://smf.cataclysmdda.com/index.php?topic=4505.msg66567#msg66567
http://smf.cataclysmdda.com/index.php?topic=4518.0
http://smf.cataclysmdda.com/index.php?topic=4517.msg66861#msg66861
Does it help ?