I have rushed in as the crazy dwarf, enraged and fully psychotic, and half the monsters rush right past me and start mashing the cleric. Places seen: Shan To Kor(entire series), Inferno of the Damned, Tangleroot, Stormcleave... and I think Cabal for One. In almost all these cases the cleric was at the BACK of the party and rushed through everyone to attack specifically the Cleric and nobody else. I even whalloped a monster for 126 slash damage and it kept on going(it had a sliver of health left), attacked the cleric, and died when the ranger shot it down.