Is there any point to having a priest instead of a bishop?
It looks like the Bishop gets the spells a few levels later and might level more slowly... And the priest gets a skill to help against undead enemies. Is that all? Is there any other advantage to keeping a priest?
Turn Undead is a handy enough ability that it is a good idea to keep a Priest around. I'm running around with a Priest and a Bishop, and they're both rocking (though I messed up by making the Bishop a Gnome instead of a Dwarf).
If I had to drop someone to make room for a Bishop, I'd drop a Mage.