I can't seem to keep any clerics in my party! First Anomen left me, after killing his sister's killer. Then, Keldorn got pissed off at Viconia for being a drow (are all paladins so racist?) I'd really like to have a full cleric, cause they can kick a** (full armour, spells, and the hammer). Does anyone have any suggestions on keeping Keldorn from dicing up Viconia? (btw, Casomyr works well on evil party members too...)

Firstly, That wasn't his sister's killer. And secondly Viconia is quite the bitch. I recommend slapping aerie in their no armor sure but you do get cleric spells. Frankly I hate all paladins they um cramp my style. Frankly, if your leaning to evil (As it seems you are) Drop Keldorn and get that Chaotic Evil dwarf from the copper cornet.
Or, you could just get a rocket resistant robe like these guys.

If you really want to keep Keldorn in your party, put him in charge and he shouldn't fight with Viconia. Viconia may or may not be a bitch, but she's the best cleric in the game.