Hiya!
Personally, I went with Cleric. Being able to say "Odin, I need serious help here"...and having Odin hear and actually DO something to seriously help you is pretty much an "I win" button in this fictitious white-room scenario. Whatever/Whoever is your opponent is roughly equal in power to you (the cleric), is prepared with the specific intention of killing you. Pretty sure most Deities don't want their most honoured and faithful priests to get killed in a round or two...that's just bad PR all around! (As a meta-game...the Deity in question is the Dungeon Master; the Cleric just asked the DM to help him win...

).
^_^
Paul L. Ming