I know this should probably be common sense, or possibly on the wiki (I looked though, so be easy on me), but are bosses subject to damage UV's?
Is Snarbolax affected by bonus damage against beasts?
Is Royal Jelly affected by bonus damage against slimes?
Is Vanaduke affected by bonus damage against undead?
Yes, yes, and maybe?. I'm not sure on Vanaduke.
~Gwen