why does enochian exist for black mage

[Kabooa]

to make you jump through more hoops to do your primary job of big numbers. XD
I don't like Enochian, I feel like the timer is to short, and that it should be a stance with some kind of drawback, like rework the entire job so that you have normal mp regen regardless of Astral Fire, and Super High MP Regen under Umbral Ice as normal (what we have now.) but while in Enochian Stance apply the No MP Regen but you gain access to your level 4 spells and the 10% damage increase, and just to balance it out a bit more apply a flat mp cost reduction to all spells cast by the black mage while its being used maybe a 50% reduction.

So you stay in fire longer and stay in ice longer?

That sounds like a net loss.