There are 18 regular keys and 31 special keys.
Let's look at the first 18. The 6th 12th 16th 17th. Of course represent divine fire.
4th 10th 11th 12th represent divine water
3th 7th 8th 9th keys represent divine air
The 5th 13th 14th and 15 represent divine earth.
As you notice we have four divisions of keys each with four keys.
This represents the Tetragrammaton, YHVH.
As you already know each each of these letters represents a element.
Fire water air and earth. As you already know enochian energy is stronger and more fully manifested in that order.
Now back to the keys as a whole.
There are in total 49 keys. 7x7 or 7+7+7+7+7+7+7 which equals 49.
The first 48 can be said to open 48 of the 49 of the gates of understanding.
The 49th key is not vocal, it is a person of the trinity, the holy spirit.
Only when you receive the 49th key(the holy spirit) the 49th gate of understanding opens, the flood gates of true holiness, of heaven, of the highest. shall be poured on you and (permanently) into you.
When this is done you shall be anointed, and the great work completed.
This make sense? Sorry if anything doesn't make sense, I have only read a few books on enochiana. Guys please do tell me where i am right and wrong.