It's only an opinion. I think it's a good idea.

Some of this depends on how many paladins you might have in your kingdom. For distribution of paladin spells I'd set a priority list of the higher wpa recipients for dark elf. Let's say you have a faery paladin in your kingdom also. The faery could then cast on lower wpa recipients.

Taking into account the paladin won't have the mana of a mystic; the question of how much mana should be used for self defense, offense and kingdom well being should be managed.