Parry does not even work properly in NWN, don't ever take it. I doubt the henchman even uses it either, you have to go into a special mode to even use it.
Shield of Faith, Aid, Bless, Magic Weapon (if you don't have a +1 weapon yet), Magic Vestment, and Bull's Strength are all good spells. Negative Energy Protection can be good if you're worried about draining attacks as well.