[renowner]

I don't think enma's is subject to the farshot penalty, and if it is, it isn't supposed to be.
Enma's is also just fine, its strong, and still instantly annihalates enemy mobs after a boar bear trap.
Divine Shower can blind and isn't able to be evaded, but its also light damage, and is in a class that generally lacks offensive power.
It does however have 180% Light attack scaling.
(Multi hits are worse against tanks, though not to the degree physical multi hits are.)

Enma's summon on the other hand does more damage that ramps up with lower hp foes, and is in a more offensively orientated class.
Though it does start at 140% Dark attack only, which is worse than Divine shower.
It can be evaded, sure. But hexes can make people unable to evade your basics.
(I would be all for making that hex also be affected by hexer spells, however. As all spells when this skill was created were already undodgable.)
They're generally used for different situations. And Enma's was actually considered more toxic than divine shower when tied with high speed divine words, which is still possible, though the cooldown makes it a lot less stupid doing so.
Another thing to consider is that getting dark attack is easier than getting light attack, as blotch raises your dark attack a lot, as does being an Umbral. And Baphomet's offering.
And that you can give people dark weaknesses with Eresh's potential skill. But there's not really a way to give light weaknesses as far as I know.
(Not counting generic stuff like aquae crest and indignant idol.)

Frankly I think Enma's is fine, and i'd rather the more outdated aspects of hexer be updated to the new systems rather than Enma's be the sole focus of tinkering.

Edit: I also think it'd be fine if Enma's Summons would make people un-revivable if defeated by the spell. You're literally pulled in by the gatekeeper of the underworld!