Oh, and so you know, it's spelled "Paladin", and I'm not quite sure how a Paladin, generally regarded as a Holy Warrior, fits in with the five elements, which tend to be more primal and naturalistic as opposed to supported by some diefic power.

Also, Lightning is generally folded into the "Air" element. If you want to go with five elements, you might want to use the five Musashi identified, Earth, Air, Water, Fire, and Void.