A couple of alternatives:
Melf's Minute Meteors will *eventually* take down the iron golem. Memorize quite a few... I am assuming you want the experience points.
If the XP isn't that important... cast Sancuary on a character and grab your stuff... they won't do anything but go *red*.
If you look up in the D&D monster manuals, they give you a lot of info on what does damage to what monsters... they are wonderful to have for this game. You may even find the info online.
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Defender for the Light -
Goodness knows there is a lot of Dark out there!! - Where are my matches?
Wandering Joke of the Laughing Hyenas