While not technically the topic of the thread, I have to *strongly* object to the Vampire being compared in power level to the Priest.
I saw the comment about Priest being low tier and said to myself - "That can't be right. I'm sure I could beat Naga City with a Priest."
Took me two tries
Halfling Priest w/ Dragon Shield. I found GG, Trisword, and Agnostic's Collar - which is admittedly lucky - but Patches teleported me into a corner and I had to burn 3 potions (while worshipping GG) to get out - which balances it some. I ended with a reasonable amount of resources left (3 health potions if you count conversion and 75 piety for Last Chance)
At a *minimum* the Priest is stronger than the Fighter, Crusader, Sorcerer, Wizard, and Vampire.
I'd also say he's most likely stronger than the Gorgon, Berserker, and Half-Dragon. He's about on par with the Bloodmage or Tinkerer.