While I appreciate this enchant receiving at least some score, I don't think it makes a lot of sense.
With all the information and debate floating around about Holy Paladins, much of it overflowing into DPS and tanking discussion (Ghostcrawler used to and sometimes still does reference Paladin Int stacking a lot), I would think this enchant would receive a 15 score alongside the +63 Spell power enchant.
30 Intellect is one way of gearing your Holy Paladin, and many Paladins even shun the 63 SP enchant, suggesting it's useless. Obviously it's not useless, as there are builds that can use it wonderfully, but the regen stacking Paladin will always go for the 30 Intellect enchant.
I don't know if the website distinguishes between classes like it does tank vs DPS for Death Knights, but if so, I would suggest this enchant be rated 15 for Holy Paladin, something similar or slightly less for Disc Priest, and the current 8 for other casters.